TMP86FS27FG datasheet(10/32 Pages) TOSHIBA

10 / 32 page

86FS27-10

2007-08-07

TMP86FS27

To set a serial PROM mode, connect device pins as shown in Figure 2.3.1.

Figure 2.3.1 Serial PROM Mode Port Setting

2.3.3

Activating Serial PROM Mode

The following is a procedure of setting of serial PROM mode. Figure 2.3.2 shows a serial PROM

mode timing.

(1) Turn on the power to the VDD pin.

(2) Set the RESET to low level.

(3) Set the TEST, BOOT1 and BOOT2 pin to high level.

(4) Wait until the power supply and clock sufficiently stabilize.

(5) Release the RESET (Set to high level).

(6) Input a matching data (5AH) to BOOT1/RXD pin after waiting for setup sequence. For details

of the setup timing, refer to 2.14 “UART Timing”.

Figure 2.3.2 Serial PROM Mode Timing

TMP86FS27

VDD(4.5 V to 5.5 V)

VDD

AVDD

TEST

P00

P01

RESET

: Pull up

XIN

XOUT

BOOT1/RXD

BOOT2/TXD

OPEN or analog reference voltage.

VAREF

VSS

VDD

TEST (Input)

RESET

(Input)

Program

BOOT1 (Input)/

RXD (Input)

BOOT2 (Input)/

TXD (Output)

Serial PROM mode

Reset mode

Indeterminate

Matching

data input

Setup time for serial PROM mode (Rxsup)

Fixed to high level by pull up

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