TMS370 datasheet(9/63 Pages) TI

9 / 63 page

TMS370CxCx

8-BIT MICROCONTROLLER

SPNS040B – NOVEMBER 1995 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

peripheral file (PF) (continued)

Table 4. TMS370CxCx Peripheral File Address Map

ADDRESS RANGE

PERIPHERAL FILE

DESIGNATOR

DESCRIPTION

1000h – 100Fh

P000 – P00F

Reserved

1010h – 101Fh

P010 – P01F

System and EPROM 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 – 105Fh

P050 – P05F

Serial communications interface 2 registers

1060h – 106Fh

P060 – P06F

Reserved

1070h – 107Fh

P070 – P07F

Analog-to-digital converter 2 registers

1080h – 1FFFh

P080 – P0FF

Reserved

program EPROM†

The TMS370C6C2 device contains 8K bytes of EPROM mapped at location 6000h 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 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 P01Ch as shown in Table 5.

D Write protection: Writes to the program EPROM are disabled under the following conditions:

–

Reset halts all programming to the EPROM module.

–

Low-power modes

–

13 V not applied to MC

Table 5. Data EEPROM and Program EPROM Control Registers Memory Map

ADDRESS

SYMBOL

NAME

P01A to P01B

—

Reserved

P01C

EPCTL

Program EPROM Control Register

program ROM†

The program read-only memory (ROM) consists of 4K bytes of mask-programmable ROM. 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. Refer to Figure 3 for ROM memory map.

† Memory addresses 7FE0h through 7FEBh are reserved for Texas Instruments, and addresses 7FECh through 7FFFh are reserved for

interrupt and reset vectors. Trap vectors, used with TRAP0 through TRAP15 instructions, are located between addresses 7FC0h and

7FDFh.

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