TMS370CX4X Datasheet, PDF (3/66 Pages) Texas Instruments – 8-BIT MICROCONTROLLER

functional block diagram
XTAL2/
INT1 INT2 INT3 XTAL1 CLKIN MC
RESET
Interrupts
Clock Options
Divide-by-4 or
Divide-by-1(PLL)
System
Control
TMS370Cx4x
8-BIT MICROCONTROLLER
SPNS016C – NOVEMBER 1992 – REVISED FEBRUARY 1997
AN0–AN7
A-to-D
Converter 1
(40-Pin: 4 CH)
(44-Pin: 8 CH)
40-PIN DIP: AN2, AN3,
AN6, AN7
44-PIN PLCC:AN0–AN7
VCC3
VSS3
CPU
Program Memory
ROM: 4K or 8K Bytes
EPROM:8K Bytes
RAM
256 Bytes
(Usable as Registers)
Data EEPROM
0 or 256 Bytes
Port A
8
Port B
3
Port D
5
Serial
Communications
Interface 1
Timer 2A
Timer 1
Watchdog
SCIRXD
SCITXD
SCICLK
T2AIC1 / CR
T2AEVT
T2AIC2 / PWM
T1IC/CR
T1EVT
T1PWM
VCC
VSS
description
The TMS370C040A, TMS370C042A, TMS370C340A, TMS370C342A, TMS370C742A, and SE370C742A
devices are members of the TMS370 family of single-chip 8-bit microcontrollers. Unless otherwise noted, the
term TMS370Cx4x refers to these devices. TMS370 family provides cost-effective real-time system control
through integration of advanced peripheral function modules and various on-chip memory configurations.
The TMS370Cx4x family is implemented using high-performance silicon-gate CMOS EPROM and EEPROM
technology. The low-operating power, wide-operating temperature range, and noise immunity of CMOS
technology coupled with the high performance and extensive on-chip peripheral functions make the
TMS370Cx4x devices attractive in system designs for automotive electronics, industrial motor, computer
peripheral control, telecommunications, and consumer applications.
The TMS370Cx4x devices contain the following on-chip peripheral modules:
D Eight-channel (for 44 pin device) or four-channel (for 40-pin device) 8-bit analog-to-digital converter 1
(ADC1)
D Serial communications interface 1 (SCI1)
D Two 16-bit general-purpose timers (one with an 8-bit prescaler)
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