86FS27-11

2007-08-07

TMP86FS27

2.4

Interface Specifications for UART

The following shows the UART communication format used in serial PROM mode.

Before on-board programming can be executed, the communication format on the external

controller side must also be setup in the same way as for this product.

Note that although the default baud rate is 9,600 bps, it can be changed to other values as shown

in Table 2.4.1. The Table 2.4.2 shows an operating frequency and baud rate in serial PROM mode.

Except frequency which is not described in Table 2.4.2 can not use in serial PROM mode.

Baud rate (Default): 9,600 bps

Data length: 8 bits

Parity addition: None

Stop bit length: 1 bit

Table 2.4.1 Baud Rate Modification Data

Table 2.4.2 Operating Frequency and Baud Rate in Serial PROM Mode

Note:

“Reference Frequency” shows the high-frequency area supported in serial PROM mode.

Except the above frequency can not be supported in serial PROM mode.

2.5

Command

There are five commands in serial PROM mode. After reset release, the TMP86FS27 waits a

matching data (5AH).

Table 2.5.1 Command in Serial PROM Mode

Baud rate modification data

04H

05H

07H

0AH

18H

28H

Baud rate (bps)

76800

62500

38400

31250

19200

9600

Reference Baud

Rate (Baud)

76800

62500

38400

31250

19200

9600

Baud Rate

Modification Data

04H

05H

07H

0AH

18H

28H

Reference

Frequency

(MHz)

(bps)

(%)

(bps)

(%)

(bps)

(%)

(bps)

(%)

(bps)

(%)

(bps)

(%)

2

–

–––

––

––––

9615

+0.16

4

–

–

–

–

–

–

31250

0.00

19231

+0.16

9615

+0.16

8

–

–

62500

0.00

38462

+0.16

31250

0.00

19231

+0.16

9615

+0.16

16

76923

+0.16

62500

0.00

38462

+0.16

31250

0.00

19231

+0.16

9615

+0.16

Command Data

Operation Mode

Remarks

5AH

Setup

Matching data. Always start with this command after reset release.

30H

Flash memory writing

Writing to area from 1000H to FFFFH is enable.

60H

RAM loader

Writing to area from 0050H to 0430H is enable.

90H

Flash memory SUM output

The checksum of entire flash memory area (from 1000H to FFFFH)

is output in order of the upper byte and the lower byte.

C0H

Product discrimination code output

Product discrimination code, that is expressed by 13 bytes data, is

output.