7549 datasheet(56/86 Pages) RENESAS

56 / 86 page

Rev.2.02

Mar 31, 2009

Page 54 of 81

REJ03B0202-0202

7549 Group

QzROM Writing Mode

In the QzROM writing mode, the user ROM area can be written

while the microcomputer is mounted on-board by using a serial

programmer which is applicable for this microcomputer.

Table 10 lists the pin description (QzROM writing mode) and

Figure 69 shows the pin connections.

Refer to Figure 70 and Figure 71 for examples of a connection

with a serial programmer.

Contact the manufacturer of your serial programmer for serial

programmer.

Refer to the user's manual of your serial programmer for details

on how to use it.

Table 10 Pin description (QzROM writing mode)

Fig 69. Pin connection diagram (M37549G3/G2/G1FP)

Name

I/O

Function

VCC, VSS

Power source

Input

Apply 2.7 to 5.5 V to VCC, and 0 V to VSS.

RESET

Reset input

Input

Reset input pin.

P21 /XIN

Clock input

Input

Set the same termination as the single-chip mode.

P20 /XOUT

Clock output

Output

P00

− P05

P11

− P17

P30, P31

I/O port

I/O

Input “H” or “L” level signal or leave the pin open.

CNVSS

VPP input

Input

QzROM programmable power source pin.

P10

ESDA I/O

I/O

Serial data I/O pin.

P06

ESCLK input

Input

Serial clock input pin.

P07

ESPGMB input

Input

Read/program pulse input pin.

Package type: PRSP0024GA-A (24P2Q-A)

P30

P31

P13/AN3/KEY3/T2OUT

P12/AN2/KEY2/CMP2

P11/AN1/KEY1/CMP1

P10/AN0/KEY0/CMP0

P07(LED7)/SRDY

P06(LED6)/SCLK

RESET

P17/AN7/KEY7

P15/AN5/KEY5

P14/AN4/KEY4

P20/XOUT/XCOUT

VSS

VCC

P16/AN6/KEY6

P21/XIN/XCIN

CNVSS

P00(LED0)/INT0

P01(LED1)/INT1

P05(LED5)/TxD

P04(LED4)/RxD

P03(LED3)/CAP0

P02(LED2)

∗ : Set the same termination as

the single-chip mode.

: QzROM pin

ESDA

ESPGMB

ESCLK

RESET

GND

VCC

VPP

∗

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