TMS370 datasheet(9/50 Pages) TI

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TMS370Cx1x

8-BIT MICROCONTROLLER

SPNS012F – MAY 1987 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

peripheral file (PF)

The TMS370Cx1x 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 TMS370Cx1x PF address map.

Table 5. TMS370Cx1x Peripheral File Address Map

ADDRESS RANGE

PERIPHERAL FILE

DESIGNATOR

DESCRIPTION

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

SPI registers

1040h – 104Fh

P040 – P04F

Timer 1 registers

1050h – 10FFh

P050 – P0FF

Reserved

data EEPROM

The TMS370Cx1x devices, containing 256 bytes of data EEPROM, have 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 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 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.

D 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

D Write protection can be overridden by applying 12 V to MC.

Table 6. Data EEPROM and PROGRAM EPROM Control Registers Memory Map

ADDRESS

SYMBOL

NAME

P01A

DEECTL

Data EEPROM Control Register

P01B

—

Reserved

P01C

EPCTL

Program EPROM Control Register

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