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PDF 3851 Data sheet ( Hoja de datos )
| Número de pieza | 3851 | |
| Descripción | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER | |
| Fabricantes | Renesas | |
| Logotipo |  |
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3851 Group (Built-in 24 KB or more ROM)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0066-0101Z
Rev.1.01
Oct 15, 2003
DESCRIPTION
The 3851 group (built-in 24 KB or more ROM) is the 8-bit micro-
computer based on the 740 family core technology.
The 3851 group (built-in 24 KB or more ROM) is designed for the
household products and office automation equipment and includes
serial I/O functions, 8-bit timer, I2C-BUS interface, and A-D con-
verter.
FEATURES
Basic machine-language instructions ..................................... 71
Minimum instruction execution time ................................. 0.5 µs
(at 8 MHz oscillation frequency)
Memory size
ROM ................................................................ 24K to 32K bytes
RAM .................................................................... 640 to 1K bytes
Programmable input/output ports ........................................... 34
Interrupts ................................................ 17 sources, 16 vectors
Timers ............................................................................ 8-bit X 4
Serial I/O1 .................... 8-bit X 1(UART or Clock-synchronized)
Serial I/O2 ................................... 8-bit X 1(Clock-synchronized)
Multi-master I2C-BUS interface .................................. 1 channel
PWM .............................................................................. 8-bit X 1
A-D converter ............................................... 10-bit X 5 channels
Watchdog timer ........................................................... 16-bit X 1
Clock generating circuit ................................... Built-in 2 circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
Power source voltage
In high-speed mode ................................................. 4.0 to 5.5 V
(at 8 MHz oscillation frequency)
In middle-speed mode ............................................. 2.7 to 5.5 V
(at 8 MHz oscillation frequency)
In low-speed mode ................................................... 2.7 to 5.5 V
(at 32 kHz oscillation frequency)
Power dissipation
In high-speed mode ......................................................... 34 mW
(at 8 MHz oscillation frequency, at 5 V power source voltage)
In low-speed mode
Except M38517F8FP/SP ................................................. 60 µW
M38517F8FP/SP ............................................................ 450 µW
(at 32 kHz oscillation frequency, at 3 V power source voltage)
Operating temperature range .................................. –20 to 85°C
APPLICATION
Office automation equipment, FA equipment, Household products,
Consumer electronics, etc.
PIN CONFIGURATION (TOP VIEW)
VCC
VREF
AVSS
P44/INT3/PWM
P43/INT2/SCMP2
P42/INT1
P41/INT0
P40/CNTR1
P27/CNTR0/SRDY1
P26/SCLK1
P25/SCL2/TxD
P24/SDA2/RxD
P23/SCL1
P22/SDA1
CNVSS
P21/XCIN
P20/XCOUT
RESET
XIN
XOUT
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
42 P30/AN0
41 P31/AN1
40 P32/AN2
39 P33/AN3
38 P34/AN4
37 P00/SIN2
36 P01/SOUT2
35 P02/SCLK2
34 P03/SRDY2
33 P04
32 P05
31 P06
30 P07
29 P10/(LED0)
28 P11/(LED1)
27 P12/(LED2)
26 P13/(LED3)
25 P14/(LED4)
24 P15/(LED5)
23 P16/(LED6)
22 P17/(LED7)
Package type : FP ........................... 42P2R-A/E (42-pin plastic-molded SSOP)
Package type : SP ........................... 42P4B (42-pin plastic-molded SDIP)
Fig. 1 M38517M8-XXXFP/SP pin configuration
Rev.1.01 Oct 15, 2003 page 1 of 89
1 page  
3851 Group (Built-in 24 KB or more ROM)
GROUP EXPANSION
Renesas plans to expand the 3851 group (built-in 24 KB or more
ROM) as follows.
Memory Type
Support for mask ROM, One Time PROM, and flash memory ver-
sions.
Memory Size
Flash memory size ......................................................... 32 K bytes
Mask ROM size ................................................. 24 K to 32 K bytes
One Time PROM size ..................................................... 24 K bytes
RAM size ............................................................... 640 to 1 K bytes
Packages
42P4B ......................................... 42-pin shrink plastic-molded DIP
42P2R-A/E ......................................... 42-pin plastic-molded SSOP
42S1B-A .................. 42-pin shrink ceramic DIP (EPROM version)
Memory Expansion Plan
ROM size (bytes)
ROM
exteranal
32K
Mass production
M38517M8/F8
28K
Mass production
24K M38514M6/E6
20K
16K
12K
8K
384 512 640 768 896 1024 1152 1280 1408 1536 2048
RAM size (bytes)
Products under development or planning: the development schedule and specification may be revised without notice.
The development of planning products may be stopped.
Fig. 4 Memory expansion plan
Rev.1.01 Oct 15, 2003 page 5 of 89
5 Page 
3851 Group (Built-in 24 KB or more ROM)
MEMORY
Special Function Register (SFR) Area
The Special Function Register area in the zero page contains
control registers such as I/O ports and timers.
RAM
RAM is used for data storage and for stack area of subroutine
calls and interrupts.
ROM
The first 128 bytes and the last 2 bytes of ROM are reserved for
device testing and the rest is user area for storing programs.
Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
Zero Page
Access to this area with only 2 bytes is possible in the zero page
addressing mode.
Special Page
Access to this area with only 2 bytes is possible in the special
page addressing mode.
RAM area
RAM size
(bytes)
192
256
384
512
640
768
896
1024
1536
2048
Address
XXXX16
00FF16
013F16
01BF16
023F16
02BF16
033F16
03BF16
043F16
063F16
083F16
ROM area
ROM size
(bytes)
4096
8192
12288
16384
20480
24576
28672
32768
36864
40960
45056
49152
53248
57344
61440
Address
YYYY16
F00016
E00016
D00016
C00016
B00016
A00016
900016
800016
700016
600016
500016
400016
300016
200016
100016
Fig. 8 Memory map diagram
Address
ZZZZ16
F08016
E08016
D08016
C08016
B08016
A08016
908016
808016
708016
608016
508016
408016
308016
208016
108016
000016
004016
010016
RAM
SFR area
Zero page
XXXX16
0FF016
0FFF16
Not used
SFR area (Note)
Not used
YYYY16
Reserved ROM area
(128 bytes)
ZZZZ16
ROM
FF0016
FFDC16
Interrupt vector area
FFFE16
FFFF16 Reserved ROM area
Special page
Note: Flash memory version only
Rev.1.01 Oct 15, 2003 page 11 of 89
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet 3851.PDF ] | |
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