TI TMS370CX8XN

TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
D
D
D
D
D
N PACKAGE
( TOP VIEW )
C2
C3
C4
C5
RESET
INT1
INT2
INT3
NC
VCC
A7
A6
A5
A4
A3
A2
A1
A0
D7
D4
1
40
2
39
3
38
4
37
5
36
6
35
7
34
8
33
9
32
10
31
11
30
12
29
13
28
14
27
15
26
16
25
17
24
18
23
19
22
20
21
C1
C0
B0
B1
B2
B3
MC
XTAL2/CLKIN
XTAL1
B7
B6
B5
B4
VSS
T1IC/CR
T1PWM
T1EVT
D5
D6
D3
FZ AND FN PACKAGES
( TOP VIEW )
RESET
C5
C4
C3
C2
C1
C0
B0
B1
B2
B3
D
CMOS/ EEPROM/ EPROM Technologies on
a Single Device
– Mask-ROM Devices for High-Volume
Production
– One-Time-Programmable (OTP) EPROM
Devices for Low-Volume Production
– Reprogrammable EPROM Devices for
Prototyping Purposes
Internal System Memory Configurations
– On-Chip Program Memory Versions
– ROM: 4K Bytes
– EPROM: 16K Bytes
– Data EEPROM: 256 Bytes
– Static RAM: 128 or 256 Bytes Usable as
Registers
Flexible Operating Features
– Low-Power Modes: STANDBY and HALT
– Commercial, Industrial, and Automotive
Temperature Ranges
– Clock Options
– Divide-by-1 (2 MHz – 5 MHz SYSCLK) PLL
– Divide-by-4 (0.5 MHz – 5 MHz SYSCLK)
– Supply Voltage (VCC) 5 V ±10%
16-Bit General Purpose Timer
– Software Configurable as
a 16-Bit Event Counter, or
a 16-Bit Pulse Accumulator, or
a 16-Bit Input Capture Functions, or
Two Compare Registers, or a
Self-Contained Pulse Width Modulation
(PWM) Function
On-Chip 24-Bit Watchdog Timer
– EPROM / OTP Device: Standard
Watchdog
– Mask-ROM Devices: Hard Watchdog,
Simple Counter, or Standard Watchdog
Flexible Interrupt Handling
– Two S/W Programmable Interrupt Levels
– Global- and Individual-Interrupt Masking
– Programmable Rising- or Falling-Edge
Detect
– Individual Interrupt Vectors
TMS370 Series Compatibility
– Register-to-Register Architecture
– 256 General-Purpose Registers
– 14 Powerful Addressing Modes
– Instructions Upwardly Compatible With
all TMS370 Devices
INT1
INT2
INT3
VCC
NC
A7
A6
VSS
A5
A4
A3
D
D
6 5 4
7
3 2 1 44 43 42 41 40
39
8
38
9
37
10
36
11
35
12
34
13
33
14
32
15
31
16
30
17
29
18 19 20 21 22 23 24 25 26 27 28
MC
XTAL2/CLKIN
XTAL1
B7
B6
B5
NC
B4
C7
C6
NC
A2
A1
A0
D7
D4
D3
D6
D5
T1EVT
T1PWM
T1IC/CR
D
CMOS/ Package/TTL Compatible I / O Pins
– 40-Pin Plastic Dual-In-Line Packages /
32 Bidirectional Pins, 1 Input Pin
– 44-Pin Plastic Leaded Chip Carrier (LCC)
Packages/ 34 Bidirectional Pins,
1 Input Pin
Workstation / PC-Based Development
System
– C Compiler and C Source Debugger
– Real-Time In-Circuit Emulation
– Extensive Breakpoint / Trace Capability
– Multi-Window User Interface
– Microcontroller Programmer
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
1
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
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Pin Descriptions
PINS
TYPE†
DESCRIPTION
PDIP
(40)
LCC
(44)
A0
A1
A2
A3
A4
A5
A6
A7
18
17
16
15
14
13
12
11
20
19
18
17
16
15
13
12
I/O
Port A is a general-purpose bidirectional I / O port.
B0
B1
B2
B3
B4
B5
B6
B7
38
37
36
35
28
29
30
31
43
42
41
40
32
34
35
36
I/O
Port B is a general-purpose bidirectional I / O port.
C0
C1
C2
C3
C4
C5
C6
C7
39
40
1
2
3
4
—
—
44
1
2
3
4
5
30
31
I/O
Port C is a general-purpose bidirectional I / O port.
D3
D4
D5
D6
D7
21
20
23
22
19
23
22
25
24
21
I/O
Port D is a general-purpose bidirectional I / O port. D3 is also configurable as SYSCLK.
INT1
INT2
INT3
6
7
8
7
8
9
I
I/O
I/O
External (non-maskable or maskable) interrupt / general-purpose input pin
External maskable interrupt input / general-purpose bidirectional pin
External maskable interrupt input / general-purpose bidirectional pin
T1IC / CR
T1PWM
T1EVT
26
25
24
28
27
26
I/O
Timer1 input capture / counter reset input pin / general-purpose bidirectional pin
Timer1 PWM output pin / general-purpose bidirectional pin
Timer1 external event input pin / general-purpose bidirectional pin
RESET
5
6
I/O
System reset bidirectional pin: as input pin, RESET initializes the microcontroller; as
open-drain output, RESET indicates that an internal failure was detected by the watchdog or
oscillator fault circuit.
MC
34
39
I
Mode control pin; enables EEPROM write-protection override (WPO) mode, also EPROM
VPP
XTAL2 / CLKIN
XTAL1
33
32
38
37
I
O
Internal oscillator crystal input / external clock source input
Internal oscillator output for crystal
VCC
VSS
10
10
Positive supply voltage
27
14
Ground reference for digital logic
9
11, 29,
33
NAME
NC
These pins have no connection to the internal die.
† I = input, O = output
2
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
functional block diagram
INT1
INT2
INT3
Interrupts
XTAL1
XTAL2/
CLKIN
Clock Options:
Divide-By-4 or
Divide-By-1 (PLL)
MC
RESET
System
Control
RAM
128 or 256 Bytes
CPU
Program Memory
ROM: 4K Bytes
EPROM: 16K Bytes
Data EEPROM
0 or 256 Bytes
Timer 1
T1IC/CR
T1EVT
T1PWM
Watchdog
VCC
Port A
Port B
Port C†
Port D
8
8
8/6
5
VSS
† For the 40-pin devices, there are only six pins for port C.
description
The TMS370C080, TMS370C380, TMS370C686, and SE370C686 devices are members of the TMS370 family
of single-chip 8-bit microcontrollers. Unless otherwise noted, the term TMS370Cx8x refers to these devices.
The TMS370 family provides cost-effective real-time system control through integration of advanced
peripheral-function modules and various on-chip memory configurations.
The TMS370Cx8x family of devices is implemented using high-performance silicon-gate CMOS EPROM and
EEPROM technologies. 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
TMS370Cx8x devices attractive for system designs for automotive electronics, industrial motors, computer
peripheral controls, telecommunications, and consumer applications.
All TMS370Cx8x devices contain the following on-chip peripheral modules:
D
D
One 24-bit general-purpose watchdog timer
One 16-bit general-purpose timer with an 8-bit prescaler
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
3
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
description (continued)
Table 1 provides a memory configuration overview of the TMS370Cx8x devices.
Table 1. Memory Configurations
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PROGRAM MEMORY
(BYTES)
DATA MEMORY
(BYTES)
ROM
EPROM
RAM
EEPROM
PACKAGES
44-PIN PLCC/CLCC,
OR 40-PIN PDIP
TMS370C080
4K
—
128
256
N – PDIP
TMS370C380A
4K
—
128
—
FN – PLCC
TMS370C686A
SE370C686A†
—
16K
256
—
FN – PLCC
—
16K
256
—
DEVICE
FZ – CLCC
† System evaluators and development are for use only in prototype environment and their reliability has not been characterized.
The suffix letter (A) appended to the device names shown in the device column of Table 1 and Table 2 indicates
the configuration of the device. ROM or EPROM devices have different configurations as indicated in Table 2.
ROM devices with the suffix letter A are configured through a programmable contact during manufacture. For
a detailed description of the differences between the TMS370C080 and TMS370Cx8xA contact options (as
indicated by the suffix letter nomenclature), refer to Appendix A of the TMS370 Microcontroller Family User’s
Guide (literature number SPNU127).
For a detailed description of the differences between the TMS370C080 and the TMS370Cx8xA contact options
(as indicated by the suffix letter nomenclature), refer to Appendix A of the TMS370 Microcontroller Family User’s
Guide (literature number SPNU127).
Table 2. Suffix Letter Configuration
DEVICE‡
WATCHDOG TIMER
CLOCK
LOW-POWER MODE
EPROM A
Standard
Divide-by-4 (Standard oscillator)
Enabled
Divide-by-4 or Divide-by-1 (PLL)
Enabled or disabled
Divide-by-4 (Standard oscillator)
Enabled
Standard
ROM A
Hard
Simple
ROM without A
Standard
‡ Refer to the “device numbering conventions” section for device nomenclature and to the “device part numbers” section for ordering.
The 4K bytes of mask-programmable ROM in the associated TMS370C380 device is replaced in the
TMS370C686 with 16K bytes of EPROM. All other on-chip peripherals are identical. The one-time
programmable (OTP) (TMS370C686) device and reprogrammable (SE370C686) device are available. The
4K-byte (TMS370C080) mask-programmable ROM device relies on the 68-pin (TMS370C758) development
devices and a converter socket (part # TMDS37788OTP) for prototyping and programming purposes.
TMS370C686 OTP devices are available in plastic packages. This microcontroller is effective to use for
immediate production updates for other members of the TMS370Cx8x family or for low-volume production runs
when the mask charge or cycle time for the low-cost mask ROM devices is not practical.
The SE370C686 has a windowed ceramic package to allow reprogramming of the program EPROM memory
during the development / prototyping phase of design. The SE370C686 devices allow quick updates to
breadboards and prototype systems while iterating initial designs.
The TMS370Cx8x family provides two low-power modes (STANDBY and HALT) for applications where
low-power consumption is critical. Both modes stop all CPU activity (that is, no instructions are executed). In
the STANDBY mode, the internal oscillator and the general-purpose timer remain active. In the HALT mode,
all device activity is stopped. The device retains all RAM data and peripheral configuration bits throughout both
low-power modes.
4
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
description (continued)
The TMS370Cx8x features advanced register-to-register architecture that allows direct arithmetic and logical
operations without requiring an accumulator (for example, ADD R24, R47; add the contents of register 24 to
the contents of register 47 and store the result in register 47). The TMS370Cx8x family is fully
instruction-set-compatible, providing easy transition between members of the TMS370 8-bit microcontroller
family.
The TMS370Cx8x family provides the system designer with economical, efficient solutions to real-time control
applications. The TMS370 family compact development tool (CDT) solves the challenge of efficiently
developing the software and hardware required to design the TMS370Cx8x into an ever-increasing number of
complex applications. The application source code can be written in assembly and C languages, and the output
code can be generated by the linker. The TMS370 family CDT development tool communicates through a
standard RS-232-C interface with an existing personal computer. This allows the designer to use familiar
personal computer editors and software utilities. Precise real-time, in-circuit emulation and extensive symbolic
debug and analysis tools ensure efficient software and hardware implementation as well as reducing the
time-to-market cycle.
The TMS370Cx8x family together with the TMS370 family CDT370, software tools, the SE370C686 and
SE370C758 (FZ package) reprogrammable devices, comprehensive product documentation, and customer
support provide a complete solution to the needs of the system designer.
central processing unit (CPU)
The CPU on the TMS370Cx8x device is the high-performance 8-bit TMS370 CPU module. The ’x8x implements
an efficient register-to-register architecture that eliminates the conventional accumulator bottleneck. The
complete ’x8x instruction map is shown in Table 15 in the TMS370Cx8x instruction set overview section.
The ’370Cx8x CPU architecture provides the following components:
D
D
CPU registers:
–
A stack pointer that points to the last entry in the memory stack
–
A status register that monitors the operation of the instructions and contains the global interrupt-enable
bits
–
A program counter (PC) that points to the memory location of the next instruction to be executed
A memory map that includes:
–
128- or 256-byte general-purpose RAM that can be used for data memory storage, program
instructions, general purpose register, or the stack
–
A peripheral file that provides access to all internal peripheral modules, system-wide control functions,
and EEPROM / EPROM programming control
–
256-byte EEPROM module, that provides in-circuit programmability and data retention in power-off
conditions
–
4K-byte ROM or 16K-byte EPROM program memory
CDT is a trademark of Texas Instruments Incorporated.
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5
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
central processing unit (CPU) (continued)
Figure 1 illustrates the CPU registers and memory blocks.
Program Counter
15
Stack Pointer (SP)
7
Legend:
C=Carry
N=Negative
Z=Zero
0
Status Register (ST)
C
N
Z
V
7
6
5
4
IE2 IE1
3
2
1
0
V=Overflow
IE2=Level 2 Interrupt Enable
IE1=Level 1 Interrupt Enable
0
RAM (Includes up to 256-Byte Registers File)
0000h
R0(A)
128-Byte RAM (0000h–007Fh)
0001h
R1(B)
256-Byte RAM (0000h–00FFh)
0002h
R2
Reserved†
0003h
R3
Peripheral File
Reserved†
256-Byte Data EEPROM
Not Available‡
007Fh
R127
0000h
007Fh
0080h
00FFh
0100h
OFFFh
1000h
104Fh
1050h
1EFFh
1F00h
1FFFh
2000h
3FFFh
4000h
16K-Byte EPROM (4000h – 7FFFh)
4K-Byte ROM (7000h – 7FFFh)
Interrupts and Reset Vectors;
Trap Vectors
R255
00FFh
6FFFh
7000h
7FBFh
7FC0h
7FFFh
† Reserved means the address space is reserved for future expansion.
‡ Not available means the address space is not accessible.
Figure 1. Programmer’s Model
stack pointer (SP)
The SP is an 8-bit CPU register. Stack operates as a last-in, first-out, read / write memory. Typically, the stack
is used to store the return address on subroutine calls as well as the status register (ST) contents during interrupt
sequences.
The SP points to the last entry or top of the stack. The SP is incremented automatically before data is pushed
onto the stack and decremented after data is popped from the stack. The stack can be placed anywhere in the
on-chip RAM.
6
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
central processing unit (CPU) (continued)
status register
The ST monitors the operation of the instructions and contains the global interrupt-enable bits. The ST includes
four status bits (condition flags) and two interrupt-enable bits.
D
D
The four status bits indicate the outcome of the previous instruction; conditional instructions (for example,
the conditional-jump instructions) use the status bits to determine program flow.
The two interrupt-enable bits control the two interrupt levels.
The ST, status-bit notation, and status-bit definitions are shown in Table 3.
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Table 3. Status Registers
7
6
5
4
3
2
1
0
Reserved
Reserved
C
N
Z
V
IE2
IE1
RW-0
RW-0
RW-0
RW-0
RW-0
RW-0
R = read, W = write, 0 = value after reset
program counter (PC)
The contents of the PC point to the memory location of the next instruction to be executed. The PC consists
of two 8-bit registers in the CPU: the program counter high (PCH), and the program counter low (PCL). These
registers contain the most significant byte (MSbyte) and least significant byte (LSbyte) of a 16-bit address.
During reset, the contents of the reset vector (7FFEh, 7FFFh) are loaded into the PC. The PCH (MSbyte of the
PC) is loaded with the contents of memory location 7FFEh, and the PCL (LSbyte of the PC) is loaded with the
contents of memory location 7FFFh. Figure 2 shows this operation using an example value of 6000h as the
contents of the reset vector.
Program Counter (PC)
Memory
0000h
7FFEh
60
7FFFh
00
PCH
PCL
60
00
Figure 2. Program Counter After Reset
memory map
The TMS370Cx8x architecture is based on the Von Neuman architecture, in which the program memory and
data memory share a common address space. All peripheral input / output is memory-mapped in this same
common address space. As shown in Figure 3, the TMS370Cx8x provides memory-mapped RAM, ROM, data
EEPROM, I / O pins, peripheral functions, and system-interrupt vectors.
The peripheral file contains all I / O port control, peripheral status and control, EEPROM, EPROM, and
system-wide control functions. The peripheral file consists of 256 contiguous addresses located from 1000h to
10FFh and is divided logically into 16 peripheral file frames of 16 bytes each. Each on-chip peripheral is
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
TMS370Cx8x CPU (continued)
assigned to a separate frame through which peripheral control and data information is passed. The
TMS370Cx8x has its on-chip peripherals and system control assigned to peripheral file frames 1 through 4,
addresses 1010h through 104Fh.
Peripheral File Control Registers
0000h
007Fh
0080h
00FFh
0100h
0FFFh
1000h
128-Byte RAM
(Register File / Stack)
256-Byte RAM
(Register File / Stack)
Reserved†
Reserved†
1000h – 100Fh
System Control
1010h – 101Fh
Digital Port Control
1020h – 102Fh
Reserved
1030h – 103Fh
Timer 1
Peripheral Control
1040h – 104Fh
Peripheral File
104Fh
1050h
Reserved†
1EFFh
1F00h
256-Byte Data EEPROM
1FFFh
2000h
Vectors
Not Available‡
3FFFh
4000h
Trap 15 – 0
7FC0h – 7FDFh
Reserved
7FE0h – 7FF3h
Timer 1
7FF4h – 7FF5h
Reserved†
7FF6h – 7FF7h
Interrupt 3
7FF8h – 7FF9h
Interrupt 2
7FFAh – 7FFBh
Interrupt 1
7FFCh – 7FFDh
Reset
7FFEh – 7FFFh
16K-Byte EPROM
(4000h - 7FFFh)
6FFFh
7000h
7FBFh
7FC0h
7FFFh
8000h
4K-Byte ROM
(7000h - 7FFFh)
Interrupts and Reset Vectors;
Trap Vectors
Not Available‡
FFFFh
† Reserved means that the address space is reserved for future expansion, means the address space is not accessible.
‡ Not available means that the address space is not accessible.
Figure 3. TMS370Cx8x Memory Map
RAM/ register file (RF)
Locations within the RAM address space can serve as the RF, general-purpose read / write memory, program
memory, or the stack instructions. The TMS370C080 and TMS370C380 contain 128 bytes of internal RAM
memory mapped beginning at location 0000h (R0) and continuing through location 007Fh (R127), which is
shown in Table 4 along with ’x86 devices.
Table 4. RAM Memory Map
’x80
’x86
RAM size
128 bytes
256 bytes
Memory mapped
0000h – 007Fh
0000h – 00FFh
The first two registers, R0 and R1, are also called register A and B, respectively. Some instructions implicitly
use register A or B; for example, the instruction load SP (LDSP) assumes that the value to be loaded into the
stack pointer is contained in register B. Registers A and B are the only registers cleared on reset.
8
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
peripheral file (PF)
The TMS370Cx8x control registers contain all the registers necessary to operate the system and peripheral
modules on the device. The instruction set includes some instructions that access the PF directly. These
instructions designate the register by the number of the PF relative to 1000h, preceded by P0 for a hexadecimal
designator or P for a decimal designator. For example, the system-control register 0 (SCCR0) is located at
address 1010h; its peripheral file hexadecimal designator is P010, and its decimal designator is P16. Table 5
shows the TMS370Cx8x PF address map.
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Table 5. TMS370Cx8x Peripheral File Address Map
ADDRESS RANGE
PERIPHERAL FILE
DESIGNATOR
1000h – 100Fh
P000 – P00F
Reserved
1010h – 101Fh
P010 – P01F
System and EPROM / EEPROM control registers
1020h – 102Fh
P020 – P02F
Digital I / O port control registers
1030h – 103Fh
P030 – P03F
Reserved
1040h – 104Fh
P040 – P04F
Timer 1 registers
1050h – 10FFh
P050 – P0FF
Reserved
DESCRIPTION
data EEPROM
The TMS370C080 device, containing 256 bytes of data EEPROM, has a memory mapped beginning at location
1F00h and continuing through location 1FFFh. Writing to the data EEPROM module is controlled by the data
EEPROM control register (DEECTL) and the write-protection register (WPR). Programming algorithm
examples are available in the TMS370 Family User’s Guide (literature number SPNU127) or the
TMS370 Family Data Manual (literature number SPNS014B). The data EEPROM features include the following:
D
D
D
Programming:
–
Bit-, byte-, and block-write / erase modes
–
Internal charge pump circuitry. No external EEPROM programming voltage supply is needed.
–
Control register: Data EEPROM programming is controlled by the data EEPROM control register
(DEECTL) located in the PF frame beginning at location P01A. See Table 6.
–
In-circuit programming capability. There is no need to remove the device to program.
Write-protection. Writes to the data EEPROM are disabled during the following conditions.
–
Reset. All programming of the data EEPROM module is halted.
–
Write-protection active. There is one write-protect bit per 32-byte EEPROM block.
–
Low-power mode operation
Write-protection can be overridden by applying 12 V to MC.
Table 6. Data EEPROM and PROGRAM EPROM Control Registers Memory Map
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ADDRESS
SYMBOL
P01A
DEECTL
P01B
—
P01C
EPCTL
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Data EEPROM Control Register
Reserved
Program EPROM Control Register
• HOUSTON, TEXAS 77251–1443
9
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
program EPROM†
The TMS370C686 device contains 16K bytes of EPROM memory, mapped beginning at location 4000h and
continuing through location 7FFFh as shown in Figure 3. Reading the program EPROM modules is identical
to reading other internal memory. During programming, the EPROM is controlled by the EPROM control register
(EPCTL). The program EPROM module features include:
D
D
Programming
–
In-circuit programming capability if VPP is applied to MC
–
Control register EPROM programming is controlled by the EPROM control register (EPCTL) located in
the peripheral file (PF) frame at location P01C as shown in Table 6.
Write-protection writes to the program EPROM are disabled under the following conditions
–
Reset all programming to the EPROM module is halted
–
Low-power modes
–
13 V not applied to MC
program ROM†
The program ROM consists of 4K bytes of mask-programmable read-only memory. The program ROM is used
for permanent storage of data or instructions. Programming of the mask ROM is performed at the time of device
fabrication.
system reset
The system-reset operation ensures an orderly start-up sequence for the TMS370Cx8x CPU-based device.
There are up to three different actions that can cause the system to reset the device. Two of these actions are
generated internally, while one (RESET pin) is controlled externally. These actions are as follows:
D
D
D
Watchdog (WD) timer. A watchdog-generated reset occurs if an improper value is written to the WD key
register, or if the re-initialization does not occur before the watchdog timer timeout . See the TMS370 User’s
Guide (literature number SPNU127) for more information.
Oscillator reset. Reset occurs when the oscillator operates outside of the recommended operating range.
See the TMS370 User’s Guide (literature number SPNU127) for more information.
External RESET pin. A low-level signal can trigger an external reset. To ensure a reset, the external signal
should be held low for one SYSCLK cycle. Signals of less than one SYSCLK can generate a reset. See the
TMS370 User’s Guide (literature number SPNU127) for more information.
Once a reset source is activated, the external RESET pin is driven (active) low for a minimum of eight SYSCLK
cycles. This allows the ’x8x device to reset external system components. Additionally, if a cold start (VCC is off
for several hundred milliseconds) condition or oscillator failure occurs, or the RESET pin is held low, then the
reset logic holds the device in a reset state for as long as these actions are active.
After a reset, the program can check the oscillator-fault flag (OSC FLT FLAG, SCCR0.4), the cold-start flag
(COLD START, SCCR0.7) and the watchdog reset (WD OVRFL INT FLAG, T1CTL2.5) to determine the source
of the reset. A reset does not clear these flags. Table 7 depicts the reset sources.
† Memory addresses 7FE0h through 7FEBh are reserved for Texas Instruments Incorporated, and 7FF4h through 7FF5h along with 7FF8h
through 7FFFh are reserved for interrupt and reset vectors. Trap vectors, used with TRAP0 through TRAP15 instructions, are located between
addresses 7FC0h and 7FDFh.
10
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
system reset (continued)
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Table 7. Reset Sources
REGISTER
ADDRESS
PF
BIT NO.
CONTROL BIT
SOURCE OF RESET
SCCR0
1010h
P010
7
COLD START
Cold (power-up)
SCCR0
1010h
P010
4
OSC FLT FLAG
Oscillator out of range
T1CTL2
104Ah
P04A
5
WD OVRFL INT FLAG
Watchdog timer timeout
Once a reset is activated, the following sequence of events occurs:
1. The CPU registers are initialized: ST = 00h, SP = 01h (reset state).
2. Register A and B are initialized to 00h (no other RAM is changed).
3. The contents of the LSbyte of the reset vector (07FFh) are read and stored in the PCL.
4. The contents of the MSbyte of the reset vector (07FEh) are read and stored in the PCH.
5. Program execution begins with an opcode-fetch from the address pointed to the PC.
The reset sequence takes 20 SYSCLK cycles from the time the reset pulse is released until the first opcode
fetch. During a reset, RAM contents (except for registers A and B) remain unchanged, and the module control
register bits are initialized to their reset state.
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
interrupts
The TMS370 family software-programmable interrupt structure permits flexible on-chip and external interrupt
configurations to meet real-time interrupt-driven application requirements. The hardware-interrupt structure
incorporates two priority levels as shown in Figure 4. Interrupt level 1 has a higher priority than interrupt
level 2. The two priority levels can be masked independently by the global interrupt mask bits (IE1 and IE2) of
the ST.
EXT INT 3
INT 3
EXT INT 2
TIMER1
Overflow
INT 2
INT3 PRI
Compare1
Ext Edge
INT2 PRI
Compare2
EXT INT1
Input Capture1
CPU
INT1
Watchdog
NMI
T1 PRI
Priority
INT1 PRI
Logic
STATUS REG
IE1
Level 1 INT
IE2
Level 2 INT
Enable
Figure 4. Interrupt Control
Each system interrupt is configured independently to either the high- or low-priority chain by the application
program during system initialization. Within each interrupt chain, the interrupt priority is fixed by the position of
the system interrupt. However, since each system interrupt is selectively configured on either the high- or
low-priority-interrupt chain, the application program can elevate any system interrupt to the highest priority.
Arbitration between the two priority levels is performed within the CPU. Arbitration within each of the priority
chains is performed within the peripheral modules to support interrupt expansion for future modules. Pending
interrupts are serviced upon completion of current instruction execution, depending on their interrupt mask and
priority conditions.
The TMS370Cx8x has four hardware-system interrupts (plus RESET) as shown in Table 8. Each system
interrupt has a dedicated vector located in program memory through which control is passed to the interrupt
service routines. A system interrupt may have multiple interrupt sources. All of the interrupt sources are
individually maskable by local interrupt-enable control bits in the associated peripheral file. Each interrupt
source FLAG bit is individually readable for software polling or to determine which interrupt source generated
the associated system interrupt.
12
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
interrupts (continued)
One of the system interrupts is generated by on-chip peripheral functions, and three external interrupts are
supported. Software configuration of the external interrupts is performed through the INT1, INT2, and INT3
control registers in peripheral file frame 1. Each external interrupt is individually software configurable for input
polarity (rising or falling edge) for ease of system interface. External interrupt INT1 is software configurable as
either a maskable or non-maskable interrupt. When INT1 is configured as non-maskable, it cannot be masked
by the individual or global enable mask bits. The INT1 NMI bit is protected during non-privileged operation. It,
therefore, should be configured during the initialization sequence following reset. To maximize pin flexibility,
external interrupts INT2 and INT3 can be software-configured as general-purpose input / output pins if the
interrupt function is not required (INT1 can be similarly configured as an input pin).
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Table 8. Hardware System Interrupts
INTERRUPT SOURCE
INTERRUPT FLAG
SYSTEM
INTERRUPT
VECTOR
ADDRESS
PRIORITY†
RESET‡
7FFEh, 7FFFh
1
7FFCh, 7FFDh
2
7FFAh, 7FFBh
3
External RESET
Watchdog Overflow
Oscillator Fault Detect
COLD START
WD OVRFL INT FLAG
OSC FLT FLAG
External INT1
INT1 FLAG
External INT2
INT2 FLAG
INT1‡
INT2‡
INT3 FLAG
INT3‡
7FF8h, 7FF9h
4
T1INT§
7FF4h, 7FF5h
5
External INT3
Timer 1 Overflow
T1 OVRFL INT FLAG
Timer 1 Compare 1
T1C1 INT FLAG
Timer 1 Compare 2
T1C2 INT FLAG
Timer 1 External Edge
T1EDGE INT FLAG
Timer 1 Input Capture 1
T1IC1 INT FLAG
Watchdog Overflow
WD OVRFL INT FLAG
† Relative priority within an interrupt level
‡ Release microcontroller from STANDBY and HALT low-power modes
§ Release microcontroller from STANDBY low-power mode
privileged operation and EEPROM write-protection override
The TMS370Cx8x family is designed with significant flexibility to enable the designer to software-configure the
system and peripherals to meet the requirements of a variety of applications. The nonprivileged mode of
operation ensures the integrity of the system configuration once it is defined for an application. Following a
hardware reset, the TMS370Cx8x operates in the privileged mode, where all peripheral file registers have
unrestricted read / write access, and the application program configures the system during the initialization
sequence following reset. As the last step of system initialization, the PRIVILEGE DISABLE bit (SCCR2.0) is
set to 1 to enter the nonprivileged mode, thus disabling write operations to specific configuration-control bits
within the PF. Table 9 displays the system-configuration bits, which are write-protected during the nonprivileged
mode and must be configured by software prior to exiting the privileged mode.
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
13
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
privileged operation and EEPROM write-protection override (continued)
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Table 9. Privilege Bits
REGISTER†
NAME
LOCATION
CONTROL BIT
SCCRO
P010.5
P010.6
PF AUTO WAIT
OSC POWER
SCCR1
P011.2
P011.4
MEMORY DISABLE
AUTOWAIT DISABLE
SCCR2
P012.0
P012.1
P012.3
P012.4
P012.6
P012.7
PRIVILEGE DISABLE
INT1 NMI
CPU STEST
BUS STEST
PWRDWN / IDLE
HALT / STANDBY
T1PRI
P04F.6
P04F.7
T1 PRIORITY
T1 STEST
† The privilege bits are shown in a bold typeface in the peripheral file
frame 1 section.
The WPO mode provides an external hardware method of overriding the write-protection registers (WPRs) of
data EEPROM on the TMS370C080. WPO mode is entered by applying a 12-V input to the MC pin after the
RESET pin input goes high (logic 1). The high voltage on the MC pin during the WPO mode is not the
programming voltage for the data EEPROM or program EPROM. All EEPROM programming voltages are
generated on-chip. The WPO mode provides hardware-system-level capability to modify the content of the data
EEPROM while the device remains in the application but only while requiring a 12-V external input on the MC
pin (normally not available in the end application except in a service or diagnostic environment).
low-power and IDLE modes
The TMS370Cx8x devices have two low-power modes (STANDBY and HALT) and an IDLE mode. For
mask-ROM devices, low-power modes can be disabled permanently through a programmable contact at the
time when the mask is manufactured.
The STANDBY and HALT low-power modes significantly reduce power consumption by reducing or stopping
the activity of the various on-chip peripherals when processing is not required. Each of the low-power modes
is entered by executing the IDLE instruction when the PWRDWN / IDLE bit in SCCR2 has been set to 1. The
HALT / STANDBY bit in SCCR2 controls the low-power mode selection.
In the STANDBY mode (HALT / STANDBY = 0), all CPU activity and most peripheral module activity is stopped;
however, the oscillator, internal clocks, and Timer 1 remain active. System processing is suspended until a
qualified interrupt (hardware RESET, external interrupt on INT1, INT2, INT3, or timer 1 interrupt) is detected.
In the HALT mode (HALT / STANDBY = 1), the TMS370Cx8x is placed in its lowest power-consumption mode.
The oscillator and internal clocks are stopped, causing all internal activity to be halted. System activity is
suspended until a qualified interrupt (hardware RESET, external interrupt on the INT1, INT2, or INT3) is
detected. The power-down mode-selection bits are summarized in Table 10.
14
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
low-power and IDLE modes (continued)
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Table 10. Low-Power / Idle Control Bits
POWER-DOWN CONTROL BITS
PWRDWN / IDLE
(SCCR2.6)
HALT / STANDBY
(SCCR2.7)
MODE SELECTED
1
0
STANDBY
1
1
X†
HALT
0
IDLE
† Don’t care
When low-power modes are disabled through a programmable contact in the mask-ROM devices, writing to the
SCCR2.6-7 bits is ignored. In addition, if an IDLE instruction is executed when low-power modes are disabled
through a programmable contact, the device always enters the IDLE mode.
To provide a method for always exiting low-power modes for mask-ROM devices, INT1 is enabled automatically
as a nonmaskable interrupt (NMI) during low-power modes when the hard watchdog mode is selected. This
means that the NMI is generated always, regardless of the interrupt enable flags.
The following information is preserved throughout both the STANDBY and HALT modes: RAM (register file),
CPU registers (SP, PC, and ST), I / O pin direction and output data, and status registers of all on-chip peripheral
functions. Since all CPU instruction processing is stopped during the STANDBY and HALT modes, the clocking
of the WD timer is inhibited.
clock modules
The ’x8x family provides two clock options that are referred to as divide-by-1 (phase-locked loop) and
divide-by-4 (standard oscillator). Both the divide-by-1 and divide-by-4 options are configurable during the
manufacturing process of a TMS370 microcontroller. The ’x8x masked ROM devices offer both options to meet
system engineering requirements. Only one of the two clock options is allowed on each ROM device. The ’686A
EPROM has only the divide-by-4.
The divide-by-1 clock module option provides the capability for reduced electromagnetic interference (EMI) with
no added cost.
The divide-by-1 provides a one-to-one match of the external resonator frequency (CLKIN) to the internal system
clock (SYSCLK) frequency, whereas the divide-by-4 option produces a SYSCLK which is one-fourth of the
frequency of the external resonator. Inside of the divide-by-1 module, the frequency of the external resonator
is multiplied by four, and the clock module then divides the resulting signal by four to provide the four-phased
internal system clock signals. The resulting SYSCLK is equal to the resonator frequency. These are formulated
as follows:
frequency
+ external resonator
+ CLKIN
4
4
external resonator frequency
4
Divide-by-1 option : SYSCLK +
+ CLKIN
4
Divide-by-4 option : SYSCLK
The main advantage of choosing a divide-by-1 oscillator is the improved EMI performance. The harmonics of
low-speed resonators extend through fewer of the emissions spectrum than the harmonics of faster resonators.
The divide-by-1 provides the capability of reducing the resonator speed by four times, and this results in a
steeper decay of emissions produced by the oscillator.
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
15
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
system configuration registers
Table 11 contains system-configuration, control functions, and registers for controlling EEPROM programming.
The privileged bits are shown in bold typeface in shaded areas.
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Table 11. Peripheral File Frame 1: System-Configuration Registers
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
P010
COLD
START
OSC
POWER
PF AUTO
WAIT
OSC FLT
FLAG
MC PIN
WPO
MC PIN
DATA
—
µP / µC
MODE
SCCR0
P011
—
—
—
AUTO
WAIT
DISABLE
—
MEMORY
DISABLE
—
—
SCCR1
P012
HALT /
STANDBY
PWRDWN /
IDLE
—
BUS
STEST
CPU
STEST
—
INT1
NMI
PRIVILEGE
DISABLE
SCCR2
P013
to
P016
Reserved
P017
INT1
FLAG
INT1
PIN DATA
—
—
—
INT1
POLARITY
INT1
PRIORITY
INT1
ENABLE
INT1
P018
INT2
FLAG
INT2
PIN DATA
—
INT2
DATA DIR
INT2
DATA OUT
INT2
POLARITY
INT2
PRIORITY
INT2
ENABLE
INT2
P019
INT3
FLAG
INT3
PIN DATA
—
INT3
DATA DIR
INT3
DATA OUT
INT3
POLARITY
INT3
PRIORITY
INT3
ENABLE
INT3
P01A
BUSY
—
—
—
—
AP
W1W0
EXE
DEECTL
—
—
W0
EXE
EPCTL
P01B
P01C
P01D
P01E
P01F
16
REG
Reserved
BUSY
VPPS
—
—
Reserved
POST OFFICE BOX 1443
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
digital port-control registers
Peripheral file frame 2 contains the digital I/O pin configuration and control registers. Table 12 shows the specific
addresses, registers, and control bits within this peripheral file frame. Table 13 shows the port-configuration
register setup.
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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Table 12. Peripheral File Frame 2: Digital Port-Control Registers
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
P020
Reserved
APORT1
P021
Port A Control Register 2 (must be 0)
APORT2
P022
Port A Data
P023
Port A Direction
ADATA
ADIR
P024
Reserved
BPORT1
P025
Port B Control Register 2 (must be 0)
BPORT2
P026
Port B Data
P027
Port B Direction
P028
Reserved
CPORT1
CPORT2
BDATA
BDIR
P029
Port C Control Register 2 (must be 0)
P02A
Port C Data
P02B
Port C Direction
CDATA
CDIR
P02C
Port D Control Register 1 (must be 0)
—
—
—
DPORT1
P02D
Port D Control Register 2 (must be 0)†
—
—
—
DPORT2
P02E
Port D Data
—
—
—
DDATA
P02F
Port D Direction
—
—
—
DDIR
† To configure pin D3 as SYSCLK, set port D control register 2 = 08h.
Table 13. Port-Configuration Register Setup
PORT
PIN
abcd
00q1
abcd
00y0
A
0–7
Data Out q
Data In y
B
0–7
Data Out q
Data In y
C
0–7
Data Out q
Data In y
D
3–7
Data Out q
Data In y
a = Port x Control Register 1
b = Port x Control Register 2
c = Data
d = Direction
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
17
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1
The programmable Timer 1 (T1) module of the TMS370Cx8x provides the designer with the enhanced timer
resources required to perform real-time system control. The T1 module contains the general-purpose timer and
the watchdog (WD) timer. The two independent 16-bit timers, T1 and WD timer, allow program selection of input
clock sources (real-time, external event, or pulse accumulate) with multiple 16-bit registers (input capture and
compare) for special timer function control. The Timer 1 module includes three external device pins that can
be used for multiple counter functions (operation-mode dependent), or used as general-purpose I/O pins. The
T1 module block diagram is shown in Figure 5.
T1IC/CR
MUX
T1EVT
Edge
Select
16-Bit
Capt/Comp
Register
16-Bit
Counter
16
16-Bit
Compare
Register
8-Bit
Prescaler
16-Bit
Watchdog Counter
(Aux. Timer)
MUX
PWM
Toggle
T1PWM
Interrupt
Logic
Interrupt
Logic
Figure 5. Timer 1 Block Diagram
D
D
D
D
D
D
D
18
Three Timer1 I/O pins
–
T1IC/CR: T1 input capture / counter-reset input pin, or general-purpose bidirectional I/O pin
–
T1PWM: T1 pulse-width-modulation (PWM) output pin, or general-purpose bidirectional I/O pin
–
T1EVT: T1 event input pin, or general-purpose bidirectional I/O pin
Two operational modes:
–
Dual-compare mode: Provides PWM signal
–
Capture/compare mode: Provides input capture pin
One 16-bit general-purpose resettable counter
One 16-bit compare register with associated compare logic
One 16-bit capture/compare register, which, depending on the mode of operation, operates as either
capture or compare registers.
One 16-bit WD counter can be used as an event counter, a pulse accumulator, or an interval timer if WD
feature is not needed.
Prescaler/clock sources that determines one of eight clock sources for general-purpose timer
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
D
D
D
Selectable edge-detection circuitry that, depending on the mode of operation, senses active transitions on
the input capture pins (T1IC/CR)
Interrupts that can be generated on the occurrence of:
–
A capture
–
A compare equal
–
A counter overflow
–
An external-edge detection
Sixteen T1 module control registers located in the PF frame beginning at address P040
The T1 module control registers are illustrated in Table 14.
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
19
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
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Table 14. Timer 1 Module Register Memory Map
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
REG
Mode: Dual-Compare and Capture/Compare
P040 Bit 15
T1Counter MSbyte
Bit 8
P041 Bit 7
T1 Counter LSbyte
Bit 0
P042 Bit 15
Compare Register MSbyte
Bit 8
P043 Bit 7
Compare Register LSbyte
Bit 0
P044 Bit 15
Capture/Compare Register MSbyte
Bit 8
P045 Bit 7
Capture/Compare Register LSbyte
Bit 0
P046 Bit 15
Watchdog Counter MSbyte
Bit 8
P047 Bit 7
Watchdog Counter LSbyte
Bit 0
P048 Bit 7
Watchdog Reset Key
P049
WD OVRFL
TAP SEL†
WD INPUT
SELECT2†
WD INPUT
SELECT1†
WD INPUT
SELECT0†
P04A
WD OVRFL
RST ENA†
WD OVRFL
INT ENA
WD OVRFL
INT FLAG
Bit 0
T1CNTR
T1C
T1CC
WDCNTR
WDRST
—
T1 INPUT
SELECT2
T1 INPUT
SELECT1
T1 INPUT
SELECT0
T1CTL1
T1 OVRFL
INT ENA
T1 OVRFL
INT FLAG
—
—
T1
SW RESET
T1CTL2
Mode: Dual-Compare
P04B
T1EDGE
INT FLAG
T1C2
INT FLAG
T1C1
INT FLAG
—
—
T1EDGE
INT ENA
T1C2
INT ENA
T1C1
INT ENA
T1CTL3
P04C
T1
MODE=0
T1C1
OUT ENA
T1C2
OUT ENA
T1C1
RST ENA
T1CR
OUT ENA
T1EDGE
POLARITY
T1CR
RST ENA
T1EDGE
DET ENA
T1CTL4
Mode: Capture/Compare
P04B
T1EDGE
INT FLAG
—
T1C1
INT FLAG
—
—
T1EDGE
INT ENA
—
T1C1
INT ENA
T1CTL3
P04C
T1
MODE = 1
T1C1
OUT ENA
—
T1C1
RST ENA
—
T1EDGE
POLARITY
—
T1EDGE
DET ENA
T1CTL4
Mode: Dual-Compare and Capture/Compare
P04D
—
—
—
—
T1EVT
DATA IN
T1EVT
DATA OUT
T1EVT
FUNCTION
T1EVT
DATA DIR
T1PC1
P04E
T1PWM
DATA IN
T1PWM
DATA OUT
T1PWM
FUNCTION
T1PWM
DATA DIR
T1IC/CR
DATA IN
T1IC/CR
DATA OUT
T1IC/CR
FUNCTION
T1IC/CR
DATA DIR
T1PC2
P04F
T1 STEST
T1
PRIORITY
—
—
—
—
—
—
T1PRI
† Once the WD OVRFL RST ENA bit is set, these bits cannot be changed until a reset; this applies only to the standard
watchdog and to simple counter. In the hard watchdog, these bits can be modified at any time; the WD INPUT SELECT2
bits are ignored.
20
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Figure 6 shows the Timer 1 capture/compare mode block diagram. The annotations on the diagram identify the
register and the bit(s) in the PF. For example, the actual address of T1CTL2.0 is 104Ah, bit 0, in the T1CTL2
register.
16-Bit
Capt / Comp
Register
Prescale
Clock
Source
LSB
MSB
T1C1
OUT ENA
T1CTL4.6
Toggle
T1CC.15-0
T1PC2.7-4
T1PWM
T1CNTR.15 – 0
LSB 16-Bit
MSB Counter
16
T1 PRIORITY
T1C1 INT FLAG
Compare=
T1CTL3.5
Reset
T1CTL3.0
T1C.15-0
T1 SW
RESET
0
Level 1 Int
1
Level 2 Int
T1C1 INT ENA
16-Bit LSB
Compare
Register MSB
T1C1
RST ENA
T1CTL2.0
T1PRI.6
T1 OVRFL INT FLAG
T1CTL2.3
T1CTL4.4
T1CTL2.4
T1 OVRFL INT ENA
T1PC2.3-0
T1IC/CR
T1EDGE DET ENA
Edge
Select
T1EDGE INT FLAG
T1CTL3.7
T1CTL4.0
T1CTL3.2
T1EDGE INT ENA
T1CTL4.2
T1EDGE POLARITY
Figure 6. Capture/Compare Mode
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
21
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Figure 7 shows the Timer 1 dual-compare mode block diagram. The annotations on the diagram identify the
register and the bit(s) in the peripheral frame. For example, the actual address of T1CTL2.0 is 104Ah, bit 0, in
the T1CTL2 register.
T1CC.15-0
16-Bit LSB
Capt/Comp
Register MSB
MSB
T1CTL2.0
Compare=
T1CTL4.4
T1CTL4.5
T1PC2.7-4
16
T1C1 INT FLAG
T1CTL3.5
Compare=
T1C1
RST ENA
Output
Enable
T1C2 OUT ENA
16-Bit
Counter
Reset
T1 SW
RESET
T1CTL3.6
T1CTL3.1
T1C2 INT ENA
T1CNTR.15-0
LSB
T1C2 INT FLAG
T1CTL3.0
T1CTL4.6
Toggle
Prescaler
Clock
Source
T1PWM
T1C1 OUT ENA
T1CTL4.3
T1C.15-0
T1C1 INT ENA
16-Bit LSB
Compare
Register MSB
T1CR OUT ENA
T1 OVRFL INT FLAG
T1PC2.3-0
T1IC/CR
T1CTL4.1
T1CR
RST ENA
T1CTL2.3
T1CTL2.4
T1 OVRFL INT ENA
Edge
Select
T1 PRIORITY
T1CTL4.0
T1EDGE DET ENA
T1EDGE INT FLAG
T1CTL4.2
T1EDGE POLARITY
T1CTL3.7
T1CTL3.2
T1EDGE INT ENA
Figure 7. Dual-Compare Mode
22
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
T1PRI.6
0
1
Level 1 Int
Level 2 Int
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
The TMS370Cx8x device includes a 24-bit WD timer, contained in the T1 module, which can be programmed
as an event counter, pulse accumulator, or interval timer if the watchdog function is not used. The WD function
is to monitor software and hardware operation and to implement a system reset when the WD counter is not
properly serviced (WD counter overflow or WD counter is re-initialized by an incorrect value). The WD can be
configured as one of three mask options as follows: standard watchdog, hard WD, or simple counter.
D
Standard watchdog configuration (see Figure 8) for EPROM and mask-ROM devices:
–
–
Watchdog mode
–
Ten different WD overflow rates ranging from 6.55 ms to 3.35 s at 5-MHz SYSCLK
–
A WD reset key (WDRST) register is used to clear the watchdog counter (WDCNTR) when a correct
value is written.
–
Generates a system reset if an incorrect value is written to the watchdog reset key or if the counter
overflows
–
A watchdog overflow flag (WD OVRFL INT FLAG) bit that indicates whether the WD timer initiated a
system reset
Non-watchdog mode
–
Watchdog timer can be configured as an event counter, pulse accumulator or an interval timer
WDCNTR.15-0
WD OVRFL
INT FLAG
16-Bit
Watchdog Counter
T1CTL2.6
T1CTL2.5
Reset
Clock
Prescaler
Interrupt
WD OVRFL
INT ENA
T1CTL1.7
T1CTL2.7
WD OVRFL
TAP SEL
System Reset
WD OVRFL
RST ENA
Watchdog-Reset Key
WDRST.7-0
Figure 8. Standard Watchdog
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
23
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
D
Hard watchdog configuration (see Figure 9) for mask-ROM devices:
–
Eight different WD overflow rates ranging from 26.2 ms to 3.35 s at 5-MHz SYSCLK
–
A WD reset key (WDRST) register is used to clear the watchdog counter (WDCNTR) when a correct
value is written.
–
Generates a system reset if an incorrect value is written to the WDRST or if the counter overflows.
–
A WD overflow flag (WD OVRFL INT FLAG) bit that indicates whether the WD timer initiated a system
reset.
–
Automatic activation of the WD timer upon power-up reset
–
INT1 is enabled as a nonmaskable interrupt during low-power modes.
WDCNTR.15-0
WD OVRFL
INT FLAG
16-Bit
Watchdog Counter
T1CTL2.5
Reset
Clock
Prescaler
T1CTL1.7
WD OVRFL
TAP SEL
Watchdog-Reset Key
WDRST.7-0
Figure 9. Hard Watchdog
24
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
System Reset
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
D
Simple counter configuration (see Figure 10) for mask-ROM devices only
–
Simple counter can be configured as an event counter, pulse accumulator or an internal timer.
WDCNTR.15-0
WD OVFL
INT FLAG
16-Bit
Watchdog Counter
T1CTL2.6
Interrupt
T1CTL2.5
WD OVRFL
INT ENA
Reset
Clock
Prescaler
T1CTL1.7
WD OVRFL
TAP SEL
Watchdog-Reset Key
WDRST.7-0
Figure 10. Simple Counter
instruction set overview
Table 15 provides an opcode-to-instruction cross reference of all 73 instructions and 274 opcodes of the
‘370Cx8x instruction set. The numbers at the top of this table represent the most significant nibble (MSN) of the
opcode while the numbers at the left side of the table represent the least significant nibble (LSN). The instruction
of these two opcode nibbles contains the mnemonic, operands, and byte / cycle particular to that opcode.
For example, the opcode B5h points to the CLR A instruction. This instruction contains one byte and executes
in eight SYSCLK cycles.
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
25
2
3
4
5
6
7
8
INCW
#ra,Rd
3/11
MOV
Ps,A
2/8
0
JMP
#ra
2/7
1
JN
ra
2/5
2
JZ
ra
2/5
MOV
Rs,A
2/7
MOV
#n,A
2/6
MOV
Rs,B
2/7
MOV
Rs,Rd
3/9
MOV
#n,B
2/6
MOV
B,A
1/8
MOV
#n,Rd
3/8
3
JC
ra
2/5
AND
Rs,A
2/7
AND
#n,A
2/6
AND
Rs,B
2/7
AND
Rs,Rd
3/9
AND
#n,B
2/6
AND
B,A
1/8
AND
#n,Rd
3/8
AND
A,Pd
2/9
4
JP
ra
2/5
OR
Rs,A
2/7
OR
#n,A
2/6
OR
Rs,B
2/7
OR
Rs,Rd
3/9
OR
#n,B
2/6
OR
B,A
1/8
OR
#n,Rd
3/8
5
JPZ
ra
2/5
XOR
Rs,A
2/7
XOR
#n,A
2/6
XOR
Rs,B
2/7
XOR
Rs,Rd
3/9
XOR
#n,B
2/6
XOR
B,A
1/8
6
JNZ
ra
2/5
BTJO
Rs,A,ra
3/9
BTJO
#n,A,ra
3/8
BTJO
Rs,B,ra
3/9
BTJO
Rs,Rd,ra
4/11
BTJO
#n,B,ra
3/8
7
JNC
ra
2/5
BTJZ
Rs.,A,ra
3/9
BTJZ
#n,A,ra
3/8
BTJZ
Rs,B,ra
3/9
BTJZ
Rs,Rd,ra
4/11
8
JV
ra
2/5
ADD
Rs,A
2/7
ADD
#n,A
2/6
ADD
Rs,B
2/7
9
JL
ra
2/5
ADC
Rs,A
2/7
ADC
#n,A
2/6
A
JLE
ra
2/5
SUB
Rs,A
2/7
B
JHS
ra
2/5
SBB
Rs,A
2/7
MOV
A,Pd
2/8
MOV
B,Pd
2/8
MOV
Rs,Pd
3/10
9
A
B
C
D
E
F
CLRC /
TST A
1/9
MOV
A,B
1/9
MOV
A,Rd
2/7
TRAP
15
1/14
LDST
n
2/6
MOV
B,Rd
2/7
TRAP
14
1/14
MOV
#ra[SP],A
2/7
MOV
Ps,B
2/7
MOV
Ps,Rd
3/10
DEC
A
1/8
DEC
B
1/8
DEC
Rd
2/6
TRAP
13
1/14
MOV
A,*ra[SP]
2/7
AND
B,Pd
2/9
AND
#n,Pd
3/10
INC
A
1/8
INC
B
1/8
INC
Rd
2/6
TRAP
12
1/14
CMP
*n[SP],A
2/8
OR
A,Pd
2/9
OR
B,Pd
2/9
OR
#n,Pd
3/10
INV
A
1/8
INV
B
1/8
INV
Rd
2/6
TRAP
11
1/14
extend
inst,2
opcodes
XOR
#n,Rd
3/8
XOR
A,Pd
2/9
XOR
B,Pd
2/9
XOR
#n,Pd
3/10
CLR
A
1/8
CLR
B
1/8
CLR
Rn
2/6
TRAP
10
1/14
BTJO
B,A,ra
2/10
BTJO
#n,Rd,ra
4/10
BTJO
A,Pd,ra
3/11
BTJO
B,Pd,ra
3/10
BTJO
#n,Pd,ra
4/11
XCHB
A
1/10
XCHB A /
TST B
1/10
XCHB
Rn
2/8
TRAP
9
1/14
IDLE
BTJZ
#n,B,ra
3/8
BTJZ
B,A,ra
2/10
BTJZ
#n,Rd,ra
4/10
BTJZ
A,Pd,ra
3/10
BTJZ
B,Pd,ra
3/10
BTJZ
#n,Pd,ra
4/11
SWAP
A
1/11
SWAP
B
1/11
SWAP
Rn
2/9
TRAP
8
1/14
MOV
#n,Pd
3/10
ADD
Rs,Rd
3/9
ADD
#n,B
2/6
ADD
B,A
1/8
ADD
#n,Rd
3/8
MOVW
#16,Rd
4/13
MOVW
Rs,Rd
3/12
MOVW
#16[B],Rpd
4/15
PUSH
A
1/9
PUSH
B
1/9
PUSH
Rd
2/7
TRAP
7
1/14
SETC
ADC
Rs,B
2/7
ADC
Rs,Rd
3/9
ADC
#n,B
2/6
ADC
B,A
1/8
ADC
#n,Rd
3/8
JMPL
lab
3/9
JMPL
*Rp
2/8
JMPL
*lab[B]
3/11
POP
A
1/9
POP
B
1/9
POP
Rd
2/7
TRAP
6
1/14
RTS
SUB
#n,A
2/6
SUB
Rs,B
2/7
SUB
Rs,Rd
3/9
SUB
#n,B
2/6
SUB
B,A
1/8
SUB
#n,Rd
3/8
MOV
& lab,A
3/10
MOV
*Rp,A
2/9
MOV
*lab[B],A
3/12
DJNZ
A,#ra
2/10
DJNZ
B,#ra
2/10
DJNZ
Rd,#ra
3/8
TRAP
5
1/14
RTI
1/12
SBB
#n,A
2/6
SBB
Rs,B
2/7
SBB
Rs,Rd
3/9
SBB
#n,B
2/6
SBB
B,A
1/8
SBB
#n,Rd
3/8
MOV
A, & lab
3/10
MOV
A, *Rp
2/9
MOV
A,*lab[B]
3/12
COMPL
A
1/8
COMPL
B
1/8
COMPL
Rd
2/6
TRAP
4
1/14
PUSH
ST
1/8
1/6
1/7
1/9
† All conditional jumps (opcodes 01-0F), BTJO, BTJZ, and DJNZ instructions use two additional cycles if the branch is taken. The BTJO, BTJZ, and DJNZ instructions
have a relative address as the last operand.
Template Release Date: 7–11–94
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
L
S
N
1
TMS370Cx8x
8-BIT MICROCONTROLLER
MSN
0
SPNS035B – DECEMBER 1995 – REVISED FEBRUARY 1997
26
Table 15. TMS370 Family Opcode/Instruction Map†
Table 15. TMS370 Family Opcode/Instruction Map† (Continued)
MSN
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
C
JNV
ra
2/5
MPY
Rs,A
2/46
MPY
#n,A
2/45
MPY
Rs,B
2/46
MPY
Rs,Rd
3/48
MPY
#n,B
2/45
MPY
B,A
1/47
MPY
#n,Rs
3/47
BR
lab
3/9
BR
*Rp
2/8
BR
*lab[B]
3/11
RR
A
1/8
RR
B
1/8
RR
Rd
2/6
TRAP
3
1/14
POP
ST
1/8
JGE
ra
2/5
CMP
Rs,A
2/7
CMP
#n,A
2/6
CMP
Rs,B
2/7
CMP
Rs,Rd
3/9
CMP
#n,B
2/6
CMP
B,A
1/8
CMP
#n,Rd
3/8
CMP
& lab,A
3/11
CMP
*Rp,A
2/10
CMP
*lab[B],A
3/13
RRC
A
1/8
RRC
B
1/8
RRC
Rd
2/6
TRAP
2
1/14
LDSP
D
DAC
Rs,A
2/9
DAC
#n,A
2/8
DAC
Rs,B
2/9
DAC
Rs,Rd
3/11
DAC
#n,B
2/8
DAC
B,A
1/10
DAC
#n,Rd
3/10
CALL
lab
3/13
CALL
*Rp
2/12
CALL
*lab[B]
3/15
RL
A
1/8
RL
B
1/8
RL
Rd
2/6
TRAP
1
1/14
STSP
E
JG
ra
2/5
DSB
Rs,A
2/9
DSB
#n,A
2/8
DSB
Rs,B
2/9
DSB
Rs,Rd
3/11
DSB
#n,B
2/8
DSB
B,A
1/10
DSB
#n,Rd
3/10
CALLR
lab
3/15
CALLR
*Rp
2/14
CALLR
*lab[B]
3/17
RLC
A
1/8
RLC
B
1/8
RLC
Rd
2/6
TRAP
0
1/14
NOP
F
JLO
ra
2/5
F4
8
MOVW
*n[Rn]
4/15
DIV
Rn.A
3/14-63
F4
9
JMPL
*n[Rn]
4/16
F4
A
MOV
*n[Rn],A
4/17
F4
B
MOV
A,*n[Rn]
4/16
F4
C
BR
*n[Rn]
4/16
F4
D
CMP
*n[Rn],A
4/18
F4
E
CALL
*n[Rn]
4/20
F4
F
CALLR
*n[Rn]
4/22
L
S
N
Legend:
*
= Indirect addressing operand prefix
& = Direct addressing operand prefix
# = immediate operand
#16 = immediate 16-bit number
lab = 16-label
n = immediate
i
di t 8-bit
8 bit number
b
Pd = Peripheral register containing destination type
Pn = Peripheral register
Ps = Peripheral
Peri heral register containing source byte
ra = Relative address
Rd = Register containing destination type
Rn = Register file
Rp = Register pair
Rpd = Destination register pair
Rps = Source Register pair
Rs = Register containing source byte
1/8
1/7
27
TMS370Cx8x
8-BIT MICROCONTROLLER
† All conditional jumps (opcodes 01-0F), BTJO, BTJZ, and DJNZ instructions use two additional cycles if the branch is taken. The BTJO, BTJZ, and DJNZ instructions
have a relative address as the last operand.
SPNS035B – DECEMBER 1995 – REVISED FEBRUARY 1997
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
Second byte of two-byte instructions (F4xx):
1/7
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
development system support
The TMS370 family development support tools include an assembler, a C compiler, a linker, CDT and an
EEPROM/ UVEPROM programmer.
D
D
D
Assembler/ linker (Part No. TMDS3740850–02 for PC)
–
Includes extensive macro capability
–
Provides high-speed operation
–
Includes format conversion utilities for popular formats
ANSI C Compiler (Part No. TMDS3740855–02 for PC, Part No. TMDS3740555–09 for HP700, Sun-3
or Sun-4)
–
Generates assembly code for the TMS370 that can be inspected easily
–
Improves code execution speed and reduces code size with optional optimizer pass
–
Enables direct reference to the TMS370’s port registers by using a naming convention
–
Provides flexibility in specifying the storage for data objects
–
Interfaces C functions and assembly functions easily
–
Includes assembler and linker
CDT370 (Compact Development Tool) real-time in-circuit emulation
–
D
–
Cable for 40-pin DIP (Part No. EDSTRG40DIL8X)
–
Cable for 44-pin PLCC (Part No. EDSTRG44PLCC8X)
–
Provides EEPROM and EPROM programming support
–
Allows inspection and modification of memory locations
–
Includes compatibility to upload / download program and data memory
–
Executes programs and software routines
–
Includes 1 024-sample trace buffer
–
Includes single-step executable instructions
–
Uses software breakpoints to halt program execution at selected address
–
Provides timers for analyzing total and average time in routines
–
Contains an eight-line logic probe for adding visibility of external signals to the breakpoint qualifier and
to trace display
Microcontroller programmer
–
–
D
Base (Part Number EDSCDT370 – for PC, requires cable)
Base (Part No. TMDS3760500A – for PC, requires programmer head)
–
Single unit head for 44-pin PLCC (Part No. TMDS3780510A)
–
Single unit head for 40-pin DIP (Part No. TMDS3780511A)
PC-based, window / function-key-oriented user interface for ease of use and rapid learning environment
Converter Socket (Part No. TMDS37788OTP)
HP700 is a trademark of Hewlett-Packard Company.
Sun-3 and Sun-4 are trademarks of Sun Microsystems, Incorporated.
28
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
device numbering conventions
Figure 11 illustrates the numbering and symbol nomenclature for the TMS370Cx8x family.
TMS 370 C 6 8 6
A FN L
Prefix:
TMS
SE
Family:
370
Technology:
C
= CMOS
0
3
6
= Mask ROM
= Mask ROM, No Data EEPROM
= EPROM, No Data EEPROM
Program Memory Types:
= Standard prefix for fully qualified devices
= System evaluator (window EPROM) that is used for
prototyping purpose.
= TMS370 8-Bit Microcontroller Family
Device Type:
8
= ’x8x device containing a Timer1 module
Memory Size:
0
6
= 4K bytes
= 16K bytes
A
L
T
= –40°C to 85°C
=
0°C to 70°C
= –40°C to 105°C
Temperature Ranges:
Packages:
FN
FZ
N
= Plastic Leaded Chip Carrier
= Ceramic Leaded Chip Carrier
= Plastic Dual-In-Line
ROM and EPROM Option: A
= For ROM device, the watchdog timer can be configured
as one of the three different mask options:
– A standard watchdog
– A hard watchdog
– A simple watchdog
The clock can be either:
– Divide-by-4 clock
– Divide-by-1 (PLL) clock
The low-power modes can be either:
– Enabled
– Disabled
Without A = For ROM device, a standard watchdog,
a divide-by-4 clock, and low-power modes are enabled
A = For EPROM device, a standard watchdog,
a divide-by-4 clock, and low-power modes are enabled
Figure 11. TMS370Cx8x Family Nomenclature
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
29
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
device part numbers
Table 16 provides all of the ’x8x devices available. The device part number nomenclature is designed to assist
ordering. Upon ordering, the customer must specify not only the device part number, but also the clock and
watchdog timer options desired. Each device can have only one of the three possible watchdog timer options
and one of the two clock options. The options to be specified pertain solely to orders involving ROM devices.
Table 16. Device Part Numbers
DEVICES PART NUMBERS
FOR 44 PINS (LCC)
DEVICES PART NUMBERS
FOR 40 PINS (PDIP)
TMS370C380AFNA
TMS370C380AFNL
TMS370C380AFNT
TMS370C080NA
TMS370C080NL
TMS370C080NT
TMS370C686AFNT
SE370C686AFZT†
—
—
† System evaluators are for use in prototype environment and their
reliability has not been characterized.
30
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
new code release form
Figure 12 shows a sample of the new code release form.
NEW CODE RELEASE FORM
TEXAS INSTRUMENTS
TMS370 MICROCONTROLLER PRODUCTS
DATE:
To release a new customer algorithm to TI incorporated into a TMS370 family microcontroller, complete this form and submit with the following information:
1. A ROM description in object form on Floppy Disk, Modem XFR, or EPROM (Verification file will be returned via same media)
2. An attached specification if not using TI standard specification as incorporated in TI’s applicable device data book.
Company Name:
Street Address:
Street Address:
City:
Contact Mr./Ms.:
Phone: (
State
Zip
)
Ext.:
Customer Purchase Order Number:
Customer Print Number *Yes:
#
No:
(Std. spec to be followed)
*If Yes: Customer must provide ”print” to TI w/NCRF for approval before ROM
code processing starts.
Customer Part Number:
Customer Application:
TMS370 Device:
TI Customer ROM Number:
(provided by Texas Instruments)
CONTACT OPTIONS FOR THE ’A’ VERSION TMS370 MICROCONTROLLERS
OSCILLATOR FREQUENCY
MIN
TYP
MAX
[] External Drive (CLKIN)
[] Crystal
[] Ceramic Resonator
[] Supply Voltage MIN:
(std range: 4.5V to 5.5V)
Low Power Modes
[] Enabled
[] Disabled
Watchdog counter
[] Standard
[] Hard Enabled
[] Simple Counter
Clock Type
[] Standard (/4)
[] PLL (/1)
NOTE:
Non ’A’ version ROM devices of the TMS370 microcontrollers will have the
“Low-power modes Enabled”, “Divide-by-4” Clock, and “Standard” Watchdog
options. See the TMS370 Family User’s Guide (literature number SPNU127)
or the TMS370 Family Data Manual (literature number SPNS014B).
MAX:
TEMPERATURE RANGE
[] ’L’:
0° to 70°C (standard)
[] ’A’:
–40° to 85°C
[] ’T’:
–40° to 105°C
PACKAGE TYPE
[] ’N’ 28-pin PDIP
[] “FN” 44-pin PLCC
[] “FN” 28-pin PLCC
[] “FN” 68-pin PLCC
[] “N” 40-pin PDIP
[] “NM” 64-pin PSDIP
[] “NJ” 40-pin PSDIP (formerly known as N2)
SYMBOLIZATION
BUS EXPANSION
[] TI standard symbolization
[] TI standard w/customer part number
[] Customer symbolization
(per attached spec, subject to approval)
[] YES
[] NO
NON-STANDARD SPECIFICATIONS:
ALL NON-STANDARDS SPECIFICATIONS MUST BE APPROVED BY THE TI ENGINEERING STAFF: If the customer requires expedited production material
(i.e., product which must be started in process prior to prototype approval and full production release) and non-standard spec issues are not resolved to the
satisfaction of both the customer and TI in time for a scheduled shipment, the specification parameters in question will be processed/tested to the standard
TI spec. Any such devices which are shipped without conformance to a mutually approved spec, will be identified by a ’P’ in the symbolization preceding the
TI part number.
RELEASE AUTHORIZATION:
This document, including any referenced attachments, is and will be the controlling document for all orders placed for this TI custom device. Any changes must
be in writing and mutually agreed to by both the customer and TI. The prototype cycletime commences when this document is signed off and the verification
code is approved by the customer.
1. Customer:
Date:
2. TI: Field Sales:
Marketing:
Prod. Eng.:
Proto. Release:
Figure 12. Sample New Code Release Form
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
31
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
Table 17 is a collection of all the peripheral file frames used in the ’Cx8x (provided for a quick reference).
ÁÁÁÁ
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Á
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ÁÁÁÁ
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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Table 17. Peripheral File Frame Compilation
System Configuration Registers
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
P010
COLD
START
OSC
POWER
PF AUTO
WAIT
OSC FLT
FLAG
MC PIN
WPO
MC PIN
DATA
—
µP / µC
MODE
SCCR0
P011
—
—
—
AUTO
WAIT
DISABLE
—
MEMORY
DISABLE
—
—
SCCR1
P012
HALT /
STANDBY
PWRDWN /
IDLE
—
BUS
STEST
CPU
STEST
—
INT1
NMI
PRIVILEGE
DISABLE
SCCR2
P013
to
P016
REG
Reserved
P017
INT1
FLAG
INT1
PIN DATA
—
—
—
INT1
POLARITY
INT1
PRIORITY
INT1
ENABLE
INT1
P018
INT2
FLAG
INT2
PIN DATA
—
INT2
DATA DIR
INT2
DATA OUT
INT2
POLARITY
INT2
PRIORITY
INT2
ENABLE
INT2
P019
INT3
FLAG
INT3
PIN DATA
—
INT3
DATA DIR
INT3
DATA OUT
INT3
POLARITY
INT3
PRIORITY
INT3
ENABLE
INT3
P01A
BUSY
—
—
—
—
AP
W1W0
EXE
DEECTL
—
—
W0
EXE
EPCTL
P01B
P01C
Reserved
BUSY
VPPS
—
—
P01D
P01E
P01F
Reserved
Digital Port Control Registers
P020
Reserved
APORT1
P021
Port A Control Register 2 (must be 0)
APORT2
P022
Port A Data
P023
Port A Direction
ADATA
P024
Reserved
BPORT1
P025
Port B Control Register 2 (must be 0)
BPORT2
P026
Port B Data
P027
Port B Direction
ADIR
BDATA
BDIR
P028
Reserved
CPORT1
P029
Port C Control Register 2 (must be 0)
CPORT2
P02A
Port C Data
P02B
Port C Direction
CDATA
CDIR
P02C
Port D Control Register 1 (must be 0)
—
—
—
DPORT1
P02D
0)†
—
—
—
DPORT2
P02E
Port D Control Register 2 (must be
Port D Data
—
—
—
DDATA
P02F
Port D Direction
—
—
—
DDIR
Timer1 Module Register Memory Map
Modes: Dual-Compare and Capture/Compare
P040
Bit 15
T1Counter MSbyte
Bit 8
P041
Bit 7
T1 Counter LSbyte
Bit 0
† To configure pin D3 as SYSCLK, set port D control register 2 = 08h.
32
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
T1CNTR
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
Table 17. Peripheral File Frame Compilation (Continued)
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PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
REG
Modes: Dual-Compare and Capture/Compare (Continued)
P042
Bit 15
Compare Register MSbyte
Bit 8
P043
Bit 7
Compare Register LSbyte
Bit 0
P044
Bit 15
Capture/Compare Register MSbyte
Bit 8
P045
Bit 7
Capture/Compare Register LSbyte
Bit 0
P046
Bit 15
Watchdog Counter MSbyte
Bit 8
P047
Bit 7
Watchdog Counter LSbyte
Bit 0
P048
Bit 7
Watchdog Reset Key
P049
WD OVRFL
TAP SEL†
WD INPUT
SELECT2†
WD INPUT
SELECT1†
WD INPUT
SELECT0†
P04A
WD OVRFL
RST ENA†
WD OVRFL
INT ENA
WD OVRFL
INT FLAG
Bit 0
T1C
T1CC
WDCNTR
WDRST
—
T1 INPUT
SELECT2
T1 INPUT
SELECT1
T1 INPUT
SELECT0
T1CTL1
T1 OVRFL
INT ENA
T1 OVRFL
INT FLAG
—
—
T1
SW RESET
T1CTL2
Mode: Dual-Compare
P04B
T1EDGE
INT FLAG
T1C2
INT FLAG
T1C1
INT FLAG
—
—
T1EDGE
INT ENA
T1C2
INT ENA
T1C1
INT ENA
T1CTL3
P04C
T1 MODE=0
T1C1
OUT ENA
T1C2
OUT ENA
T1C1
RST ENA
T1CR
OUT ENA
T1EDGE
POLARITY
T1CR
RST ENA
T1EDGE
DET ENA
T1CTL4
Mode: Capture / Compare
P04B
T1EDGE
INT FLAG
—
T1C1
INT FLAG
—
—
T1EDGE
INT ENA
—
T1C1
INT ENA
T1CTL3
P04C
T1
MODE = 1
T1C1
OUT ENA
—
T1C1
RST ENA
—
T1EDGE
POLARITY
—
T1EDGE
DET ENA
T1CTL4
Modes: Dual-Compare and Capture/Compare
P04D
—
—
—
—
T1EVT
DATA IN
T1EVT
DATA OUT
T1EVT
FUNCTION
T1EVT
DATA DIR
T1PC1
P04E
T1PWM
DATA IN
T1PWM
DATA OUT
T1PWM
FUNCTION
T1PWM
DATA DIR
T1IC/CR
DATA IN
T1IC/CR
DATA OUT
T1IC/CR
FUNCTION
T1IC/CR DATA
DIR
T1PC2
P04F
T1 STEST
T1
PRIORITY
—
—
—
—
—
—
T1PRI
† Once the WD OVRFL RST ENA bit is set, these bits cannot be changed until a reset; this applies only to the standard
watchdog and to simple counter. In the hard watchdog, these bits can be modified at any time; the WD INPUT SELECT2
bits are ignored.
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
33
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range,VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.6 V to 7 V
Input voltage range, All pins except MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.6 V to 7 V
MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.6 V to 14 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA
Continuous output current per buffer, IO (VO = 0 to VCC)) (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . ± 10 mA
Maximum ICC current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 mA
Maximum ISS current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 170 mA
Continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 W
Operating free-air temperature range, TA: L version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 4 0°C to 85°C
T version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 4 0°C to 105°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Unless otherwise noted, all voltage values are with respect to VSS.
2. Electrical characteristics are specified with all output buffers loaded with specified IO current. Exceeding the specified IO current in
any buffer can affect the levels on other buffers.
recommended operating conditions
VCC
VIL
Supply voltage (see Note 1)
RAM data-retention supply voltage (see Note 3)
Low level input voltage
Low-level
All pins except MC
MC, normal operation
All pins except MC, XTAL2 / CLKIN, and
RESET
VIH
Hi h l
l input
i
t voltage
lt
High-level
MC (mode control) voltage
Operating free-air temperature
MAX
5
5.5
V
3
5.5
V
VSS
VSS
0.8
0.3
2
0.8 VCC
RESET
0.7 VCC
VCC
VCC
11.7
12
13
13
13.2
13.5
Microcomputer
VSS
0
85
T version
– 40
105
• HOUSTON, TEXAS 77251–1443
V
V
70
– 40
POST OFFICE BOX 1443
V
0.3
A version
NOTES: 1. Unless otherwise noted, all voltage values are with respect to VSS.
3. RESET must be externally activated when VCC or SYSCLK is not within the recommended operating range.
34
UNIT
VCC
EPROM programming voltage (VPP)
L version
TA
NOM
4.5
XTAL2 / CLKIN
EEPROM write protect override (WPO)
VMC
MIN
°C
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VOL
Low-level output voltage
VOH
High level output voltage
High-level
II
Input current
IOL
Low-level output current
IOH
High level output current
High-level
TEST CONDITIONS
IOL = 1.4 mA
IOH = – 50 µA
IOH = – 2 mA
0 V < VI ≤ 0.3 V
MC
I / O pins
ICC
Supply
y current (STANDBY
(
mode))
OSC POWER bit = 1 (see Note 9)
Supply current (HALT mode)
MAX
0.4
0.9 VCC
UNIT
V
V
2.4
10
650
See Note 4
12 V ≤ VI ≤ 13 V
50
0 V ≤ VI ≤ VCC
VOH = 2.4 V
See Notes 5 and 6
SYSCLK = 5 MHz
Supply current (STANDBY mode)
OSC POWER bit = 0 (see Note 8)
TYP
0.3 V < VI ≤ 13 V
VOL = 0.4 V
VOH = 0.9 VCC
Supply current (operating mode)
OSC POWER bit = 0 (see Note 7)
MIN
± 10
1.4
µA
mA
µA
mA
– 50
µA
–2
mA
30
45
See Notes 5 and 6
SYSCLK = 3 MHz
20
30
See Notes 5 and 6
SYSCLK = 0.5 MHz
7
11
See Notes 5 and 6
SYSCLK = 5 MHz
10
17
See Notes 5 and 6
SYSCLK = 3 MHz
8
11
See Notes 5 and 6
SYSCLK = 0.5 MHz
2
3.5
See Notes 5 and 6
SYSCLK = 3 MHz
6
8.6
See Notes 5 and 6
SYSCLK = 0.5 MHz
2
3.0
See Note 5
XTAL2 / CLKIN < 0.2 V
2
30
mA
mA
mA
µA
NOTES: 4. Input current IPP is a maximum of 50 mA only when you are programming EPROM.
5. Single-chip mode, ports configured as inputs or outputs with no load. All inputs ≤ 0.2 V or ≥ VCC – 0.2V.
6. XTAL2/CLKIN is driven with an external square wave signal with 50% duty cycle and rise and fall times less than 10 ns. Current
can be higher with a crystal oscillator. At 5 MHz SYSCLK, this extra current = 0.01 mA x (total load capacitance + crystal capacitance
in pF).
7. Maximum operating current = 7.6 (SYSCLK) + 7 mA.
8. Maximum standby current = 3 (SYSCLK) + 2 mA. (OSC POWER bit = 0).
9. Maximum standby current = 2.24 (SYSCLK) + 1.9 mA. (OSC POWER bit = 1, only valid up to 3 MHz SYSCLK).
POST OFFICE BOX 1443
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35
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
XTAL2/CLKIN
C1
(see Note B)
XTAL1
Crystal/Ceramic
Resonator
(see Note A)
XTAL2/CLKIN
C2
(see Note B)
XTAL1
C3
(see Note B)
External
Clock Signal
NOTES: A. The crystal/ceramic resonator frequency is four times the reciprocal of the system clock period.
B. The values of C1 and C2 are typically 15 pF and the value of C3 is typically 50 pF. See the manufacturer’s recommendations for
ceramic resonators.
Figure 13. Recommended Crystal/Clock Connections
Load Voltage
1.2 kΩ
VO
20 pF
Case 1: VO = VOH = 2.4 V; Load Voltage = 0 V
Case 2: VO = VOL = 0.4 V; Load Voltage = 2.1 V
NOTE A: All measurements are made with the pin loading as shown unless otherwise noted. All measurements are made with XTAL2/CLKIN
driven by an external square wave signal with a 50% duty cycle and rise and fall times less than 10 ns unless otherwise stated.
Figure 14. Typical Output Load Circuit (See Note A)
VCC
VCC
300 Ω
Pin Data
30 Ω
Output
Enable
I/O
6 kΩ
INT1
20 Ω
20 Ω
GND
GND
Figure 15. Typical Buffer Circuitry
36
POST OFFICE BOX 1443
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TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
PARAMETER MEASUREMENT INFORMATION
timing parameter symbology
Timing parameter symbols have been created in accordance with JEDEC Standard 100. In order to shorten the
symbols, some of the pin names and other related terminology have been abbreviated as follows:
AR
Array
CI
XTAL2/CLKIN
B
Byte
SC
SYSCLK
Lowercase subscripts and their meanings are:
c
cycle time (period)
su
setup time
d
delay time
v
valid time
f
fall time
w
pulse duration (width)
r
rise time
The following additional letters are used with these meanings:
H
High
L
Low
V
Valid
All timings are measured between high and low measurement points as indicated in Figure 16 and Figure 17.
0.8 VCC V (High)
2 V (High)
0.8 V (Low)
0.8 V (Low)
Figure 16. XTAL2/CLKIN Measurement Points
POST OFFICE BOX 1443
Figure 17. General Measurement Points
• HOUSTON, TEXAS 77251–1443
37
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
external clocking requirements for clock divided by 4 (see Note 10 and Figure 18)
NO.
1
2
3
4
PARAMETER
MIN
MAX
20
UNIT
tw(Cl)
tr(Cl)
Pulse duration, XTAL2/CLKIN (see Note 11)
Rise time, XTAL2/CLKIN
30
ns
tf(CI)
td(CIH-SCL)
Fall time, XTAL2/CLKIN
30
ns
CLKIN
Crystal operating frequency
Delay time, XTAL2/CLKIN rise to SYSCLK fall
2
ns
100
ns
20
MHz
SYSCLK
Internal system clock operating frequency†
0.5
5
MHz
† SYSCLK = CLKIN/4
NOTES: 10. For VIL and VIH, refer to recommended operating conditions.
11. This pulse may be either a high pulse, which extends from the earliest valid high to the final valid high in an XTAL2/CLKIN cycle or
a low pulse, which extends from the earliest valid low to the final valid low in an XTAL2/CLKIN cycle.
1
XTAL2/CLKIN
2
3
4
SYSCLK
Figure 18. External Clock Timing for Divide-by-4
external clocking requirements for clock divided by 1 (PLL) (see Note 10 and Figure 19)
NO.
1
2
3
4
PARAMETER
MIN
MAX
20
UNIT
tw(Cl)
tr(Cl)
Pulse duration, XTAL2/CLKIN (see Note 11)
Rise time, XTAL2/CLKIN
30
ns
tf(CI)
td(CIH-SCH)
Fall time, XTAL2/CLKIN
30
ns
100
ns
CLKIN
Crystal operating frequency
2
5
SYSCLK
Internal system clock operating frequency‡
2
5
Delay time, XTAL2/CLKIN rise to SYSCLK rise
ns
MHz
MHz
‡ SYSCLK = CLKIN/1
NOTES: 10. For VIL and VIH, refer to recommended operating conditions.
11. This pulse can be either a high pulse, which extends from the earliest valid high to the final valid high in an XTAL2/CLKIN cycle or
a low pulse, which extends from the earliest valid low to the final valid low in an XTAL2/CLKIN cycle.
1
XTAL2/CLKIN
2
3
SYSCLK
Figure 19. External Clock Timing for Divide-by-1
38
POST OFFICE BOX 1443
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4
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
switching characteristics and timing requirements (see Note 12)
NO.
PARAMETER
MIN
MAX
Divide-by-4
200
2000
Divide-by-1
200
500
5
tc
Cycle time,
time SYSCLK (system clock)
6
tw(SCL)
tw(SCH)
Pulse duration, SYSCLK low
0.5 tc–20
Pulse duration, SYSCLK high
0.5 tc
7
UNIT
ns
0.5 tc
ns
0.5 tc + 20
ns
NOTE 12: tc = system-clock cycle time = 1 / SYSCLK
5
7
6
SYSCLK
Figure 20. SYSCLK Timing
general purpose output signal switching time requirements
MIN
tr
tf
NOM
MAX
UNIT
Rise time
30
ns
Fall time
30
ns
tr
tf
Figure 21. Signal Switching Timing
recommended EEPROM timing requirements for programming
MIN
tw(PGM)B
tw(PGM)AR
MAX
UNIT
Pulse duration, programming signal to ensure valid data is stored (byte mode)
10
ms
Pulse duration, programming signal to ensure valid data is stored (array mode)
20
ms
recommended EPROM operating conditions for programming
VCC
VPP
Supply voltage
IPP
Supply current at MC pin during programming (VPP = 13 V)
SYSCLK
Supply voltage at MC pin
System clock
MIN
NOM
MAX
4.75
5.5
6
V
13
13.2
13.5
V
30
50
Divide-by-4
0.5
5
Divide-by-1
2
5
UNIT
mA
MHz
recommended EPROM timing requirements for programming
tw(EPGM)
Pulse duration, programming signal (see Note 13)
NOTE 13: Programming pulse is active when both EXE (EPCTL.0) and VPPS (EPCTL.6) are set.
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
MIN
NOM
MAX
0.40
0.50
3
UNIT
ms
39
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
Table 18 is designed to aid the user in referencing a device part number to a mechanical drawing. The table
shows a cross-reference of the device part number to the TMS370 generic package name and the associated
mechanical drawing by drawing number and name.
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
Table 18. TMS370Cx8x Family Package Type and Mechanical Cross-Reference
PKG TYPE
(mil pin spacing)
TMS370 GENERIC NAME
PKG TYPE NO. AND
MECHANICAL NAME
DEVICE PART NUMBERS
FN – 44 pin
(50-mil pin spacing)
PLASTIC LEADED CHIP CARRIER
(PLCC)
FN(S-PQCC-J**) PLASTIC J-LEADED
CHIP CARRIER
TMS370C380AFNA
TMS370C380AFNL
TMS370C380AFNT
TMS370C686AFNT
FZ – 44 pin
(50-mil pin spacing)
CERAMIC LEADED CHIP CARRIER
(CLCC)
FZ(S-CQCC-J**) J-LEADED CERAMIC
CHIP CARRIER
SE370C686AFZT
N – 40 pin
(100-mil pin spacing)
PLASTIC DUAL-IN-LINE PACKAGE
(PDIP)
N(R-PDIP-T**) PLASTIC DUAL-IN-LINE
PACKAGE
TMS370C080NA
TMS370C080NL
TMS370C080NT
40
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
MECHANICAL DATA
N (R-PDIP-T**)
PLASTIC DUAL-IN-LINE PACKAGE
24 PIN SHOWN
A
24
13
0.560 (14,22)
0.520 (13,21)
1
12
0.060 (1,52) TYP
0.200 (5,08) MAX
0.610 (15,49)
0.590 (14,99)
0.020 (0,51) MIN
Seating Plane
0.100 (2,54)
0.021 (0,53)
0.015 (0,38)
0.125 (3,18) MIN
0.010 (0,25) M
PINS **
0°– 15°
0.010 (0,25) NOM
24
28
32
40
48
52
A MAX
1.270
(32,26)
1.450
(36,83)
1.650
(41,91)
2.090
(53,09)
2.450
(62,23)
2.650
(67,31)
A MIN
1.230
(31,24)
1.410
(35,81)
1.610
(40,89)
2.040
(51,82)
2.390
(60,71)
2.590
(65,79)
DIM
4040053 / B 04/95
NOTES: A.
B.
C.
D.
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
Falls within JEDEC MS-011
Falls within JEDEC MS-015 (32 pin only)
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
41
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
MECHANICAL DATA
FN (S-PQCC-J**)
PLASTIC J-LEADED CHIP CARRIER
20 PIN SHOWN
Seating Plane
0.004 (0,10)
0.180 (4,57) MAX
0.120 (3,05)
0.090 (2,29)
D
D1
0.020 (0,51) MIN
3
1
19
0.032 (0,81)
0.026 (0,66)
4
E
18
D2 / E2
E1
D2 / E2
8
14
0.021 (0,53)
0.013 (0,33)
0.007 (0,18) M
0.050 (1,27)
9
13
0.008 (0,20) NOM
D1 / E1
D/E
D2 / E2
NO. OF
PINS
**
MIN
MAX
MIN
MAX
MIN
MAX
20
0.385 (9,78)
0.395 (10,03)
0.350 (8,89)
0.356 (9,04)
0.141 (3,58)
0.169 (4,29)
28
0.485 (12,32)
0.495 (12,57)
0.450 (11,43)
0.456 (11,58)
0.191 (4,85)
0.219 (5,56)
44
0.685 (17,40)
0.695 (17,65)
0.650 (16,51)
0.656 (16,66)
0.291 (7,39)
0.319 (8,10)
52
0.785 (19,94)
0.795 (20,19)
0.750 (19,05)
0.756 (19,20)
0.341 (8,66)
0.369 (9,37)
68
0.985 (25,02)
0.995 (25,27)
0.950 (24,13)
0.958 (24,33)
0.441 (11,20)
0.469 (11,91)
84
1.185 (30,10)
1.195 (30,35)
1.150 (29,21)
1.158 (29,41)
0.541 (13,74)
0.569 (14,45)
4040005 / B 03/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-018
42
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
TMS370Cx8x
8-BIT MICROCONTROLLER
SPNS035B –DECEMBER 1995 – REVISED FEBRUARY 1997
MECHANICAL DATA
FZ (S-CQCC-J**)
J-LEADED CERAMIC CHIP CARRIER
28 LEAD SHOWN
0.040 (1,02)
45°
Seating Plane
0.180 (4,57)
A
0.155 (3,94)
0.140 (3,55)
B
4
0.120 (3,05)
1
26
25
5
A
B
0.050 (1,27)
C
(at Seating
Plane)
0.032 (0,81)
0.026 (0,66)
0.020 (0,51)
0.014 (0,36)
19
11
18
12
0.025 (0,64) R TYP
0.040 (1,02) MIN
0.120 (3,05)
0.090 (2,29)
B
A
C
JEDEC
NO. OF
OUTLINE
PINS**
MIN
MAX
MIN
MAX
MIN
MAX
MO-087AA
28
0.485
(12,32)
0.495
(12,57)
0.430
(10,92)
0.455
(11,56)
0.410
(10,41)
0.430
(10,92)
MO-087AB
44
0.685
(17,40)
0.695
(17,65)
0.630
(16,00)
0.655
(16,64)
0.610
(15,49)
0.630
(16,00)
MO-087AC
52
0.785
(19,94)
0.795
(20,19)
0.730
(18,54)
0.765
(19,43)
0.680
(17,28)
0.740
(18,79)
MO-087AD
68
0.985
(25,02)
0.995
(25,27)
0.930
(23,62)
0.955
(24,26)
0.910
(23,11)
0.930
(23,62)
4040219 / B 03/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a ceramic lid using glass frit.
POST OFFICE BOX 1443
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43
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