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PDF W78E058B Data sheet ( Hoja de datos )
| Número de pieza | W78E058B | |
| Descripción | 8-BIT MICROCONTROLLER | |
| Fabricantes | Winbond | |
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W78E58B/W78E058B Data Sheet
www.DataSheet4U.com
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ............................................................................................................... 3
2. FEATURES ....................................................................................................................................... 3
3. PIN CONFIGURATIONS .................................................................................................................. 4
4. PIN DESCRIPTION .......................................................................................................................... 5
5. FUNCTIONAL DESCRIPTION ......................................................................................................... 6
5.1 RAM ....................................................................................................................................... 6
5.2 Timers 0, 1 and 2................................................................................................................... 6
5.3 Clock ...................................................................................................................................... 7
5.4 Crystal Oscillator.................................................................................................................... 7
5.5 External Clock........................................................................................................................ 7
5.6 Power Management............................................................................................................... 7
5.7 Reduce EMI Emission ........................................................................................................... 7
5.8 Reset...................................................................................................................................... 7
5.9 Port 4 ..................................................................................................................................... 9
5.10 INT2 / INT3 ............................................................................................................................ 9
5.11 Port 4 Base Address Registers ........................................................................................... 11
5.12 In-System Programming (ISP) Mode................................................................................... 13
5.13 In-System Programming Control Register (CHPCON) ....................................................... 15
5.14 F04KBOOT Mode (Boot From LDROM) ............................................................................. 15
6. SECURITY ...................................................................................................................................... 19
6.1 Lock Bit ................................................................................................................................ 19
6.2 MOVC Inhibit ....................................................................................................................... 19
6.3 Encryption ............................................................................................................................ 20
6.4 Oscillator Control ................................................................................................................. 20
7. ELECTRICAL CHARACTERISTICS............................................................................................... 21
7.1 Absolute Maximum Ratings................................................................................................. 21
7.2 D.C. Characteristics............................................................................................................. 21
7.3 A.C. Characteristics ............................................................................................................. 23
7.3.1 Clock Input Waveform...........................................................................................................23
7.3.2 Program Fetch Cycle ............................................................................................................23
7.3.3 Data Read Cycle...................................................................................................................24
7.3.4 Data Write Cycle ...................................................................................................................24
7.3.5 Port Access Cycle.................................................................................................................24
Publication Release Date: December 4, 2006
- 1 - Revision A8
1 page  
W78E58B/W78E058B
4. PIN DESCRIPTION
SYMBOL
EA
TYPE
DESCRIPTIONS
EXTERNAL ACCESS ENABLE: This pin forces the processor to execute the
I external ROM. The ROM address and data will not be presented on the bus if
the EA pin is high.
PSEN
PROGRAM STORE ENABLE: PSEN enables the external ROM data in the
O H Port 0 address/data bus. When internal ROM access is performed, no PSEN
strobe signal outputs originate from this pin.
ADDRESS LATCH ENABLE: ALE is used to enable the address latch that
ALE O H separates the address from the data on Port 0. ALE runs at 1/6th of the
oscillator frequency.
RST
IL
RESET: A high on this pin for two machine cycles while the oscillator is
running resets the device.
XTAL1
I
CRYSTAL 1: This is the crystal oscillator input. This pin may be driven by an
external clock.
XTAL2
O CRYSTAL 2: This is the crystal oscillator output. It is the inversion of XTAL1.
VSS I GROUND: Ground potential.
VDD I POWER SUPPLY: Supply voltage for operation.
P0.0 − P0.7 I/O D PORT 0: Function is the same as that of standard 8052.
P1.0 − P1.7
P2.0 − P2.7
I/O H PORT 1: Function is the same as that of standard 8052.
I/O H
PORT 2: Port 2 is a bi-directional I/O port with internal pull-ups. This port also
provides the upper address bits for accesses to external memory.
P3.0 − P3.7 I/O H PORT 3: Function is the same as that of the standard 8052.
P4.0 − P4.3 I/O H PORT 4: A bi-directional I/O. See details below.
* Note: TYPE I: input, O: output, I/O: bi-directional, H: pull-high, L: pull-low, D: open drain
Publication Release Date: December 4, 2006
- 5 - Revision A8
5 Page 
W78E58B/W78E058B
P4CONA (C2H)
BIT NAME
FUNCTION
7, 6
P41FUN1 The P4.1 function control bits which are the similar definition as P43FUN1,
P41FUN0 P43FUN0.
5, 4
P41CMP1 The P4.1 address comparator length control bits which are the similar definition
P41CMP0 as P43CMP1, P43CMP0.
3, 2
P40FUN1 The P4.0 function control bits which are the similar definition as P43FUN1,
P40FUN0 P43FUN0.
1, 0
P40CMP1 The P4.0 address comparator length control bits which are the similar definition
P40CMP0 as P43CMP1, P43CMP0.
P2ECON (AEH)
BIT NAME
FUNCTION
The active polarity of P4.3 when pin P4.3 is defined as read and/or write strobe
signal.
7
P43CSINV
1: P4.3 is active high when pin P4.3 is defined as read and/or write strobe
signal.
0: P4.3 is active low when pin P4.3 is defined as read and/or write strobe
signal.
6 P42CSINV The similarity definition as P43SINV.
5 P41CSINV The similarity definition as P43SINV.
4 P40CSINV The similarity definition as P43SINV.
3 - Reserve
2 - Reserve
1 -0
0 -0
5.11 Port 4 Base Address Registers
P40AH, P40AL
The Base address register for comparator of P4.0. P40AH contains the high-order byte of address,
P40AL contains the low-order byte of address.
P41AH, P41AL
The Base address register for comparator of P4.1. P41AH contains the high-order byte of address,
P41AL contains the low-order byte of address.
- 11 -
Publication Release Date: December 4, 2006
Revision A8
11 Page | ||
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