7545 datasheet(40/62 Pages) RENESAS

40 / 62 page

Rev.1.06

Mar 07, 2008

Page 40 of 59

REJ03B0140-0106

7545 Group

QzROM Writing Mode

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

rewritten 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 44 and Figure 45 show the pin connections.

Refer to Figure 46 and Figure 47 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)

Name

I/O

Function

VCC, VSS, VDDR

Power source

Input

• Apply 1.8 to 3.6 V to VCC, and 0 V to VSS and VDDR.

RESET

Reset input

Input

• Reset input pin for active

“L”. Reset occurs when RESET pin is hold at

“L”level for 16 cycles or more of XIN.

XIN

Clock input

Input

• Set the same termination as the single-chip mode.

XOUT

Clock output

Output

P00

−P05

P21

−P27

P30

−P37

P42

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.

P07

ESDA input/output

I/O

• Serial data I/O pin.

P20

ESCLK input

Input

• Serial clock input pin.

P06

ESPGMB input

Input

• Read/program pulse input pin.

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