TMP89FS60 datasheet(342/410 Pages) TOSHIBA

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Page 328

22. Serial PROM Mode

22.3 Serial PROM Mode Setting

TMP89FS60

RA002

22.3 Serial PROM Mode Setting

22.3.1 Serial PROM mode control pins

To execute on-board programming, activate the serial PROM mode. Table 22-2 shows the pin setting used to

activate the serial PROM mode.

Note: Before you activate the serial PROM mode, you must set the RXD0/SI0/P21 and TXD0/SO0/P20 pins to high (H) level by

using a pull-up resistor.

Note 1: If other parts are mounted on a user board, they may interfere with data being communicated through these communica-

tion pins during on-board programming. It is recommended that these parts be somehow isolated to prevent the pins from

being affected.

Table 22-2 Serial PROM Mode Setting

Setting

RXD0 / SI0 / P21 pin

H level

TXD0 / SO0 / P20 pin

H level

MODE, RESET pin

Table 22-3 Pin Functions in Serial PROM Mode

Pin name

(in serial PROM mode)

Input/out-

put

Function

Pin name (in MCU mode)

TXD0 / SO0

Output

Serial PROM mode control/serial data output

(See note 1)

TXD0 / SO0 / P20

RXD0 / SI0

Input

Serial PROM mode control/serial data input

RXD0 / SI0 / P21

RESET

Input

Serial PROM mode control

RESET

MODE

Input

Serial PROM mode control

MODE

SCLK0

Input

Serial clock input (if SIO is used)

These ports are in the high-impedance state in the

serial PROM mode. If the UART is used, the port input

is physically fixed to a specified input level in order to

prevent a penetration current. To enable the port input,

the SPCR<PIN1> must be set to "1" by operating the

RAM loader control program.

SCLK0

VDD

Power

supply

4.5 V to 5.5 V

AVDD

Power

supply

Connect to VDD.

VSS

Power

supply

0 V

AVSS

Power

supply

Connect to VSS.

VAREF

Power

supply

Leave open or apply reference voltage.

Input/output port other than

RXD0 and TXD0

Input/out-

put

These ports are in the high-impedance state in the serial PROM mode. The port input is physically

fixed to a specified input level in order to prevent a penetration current (the port input is disabled). To

enable the port input, the SPCR<PIN0> must be set to "1" by operating the RAM loader control pro-

gram.

XIN

Input

Connect a resonator to make these pins self-oscillate.

XOUT

Output

TMP89FS60 Datasheet(PDF) 342 Page - Toshiba Semiconductor

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