32186 datasheet(789/1032 Pages) RENESAS

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REAL TIME DEBUGGER (RTD)

15-3

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

15.2 Pin Functions of RTD

Pin Functions of the RTD are shown below.

Table 15.2.1 Pin Functions of the RTD

Pin Name

Type

Function

RTDTXD

Output

RTD serial data output

RTDRXD

Input

RTD serial data input

RTDACK

Output

Output “L” level pulse synchronously with the beginning clock edge of the output data word.

The width of this pulse indicates the type of instruction or data the RTD has received.

1 clock period: VER (continuous monitor) command

1 clock period: VEI (RTD interrupt request) command

2 clock periods: RDR (real-time RAM content output) command

3 clock periods: WRR (RAM content forcible rewrite) command or the data to rewrite

4 clock periods or more: RCV (recover from runaway) command

RTDCLK

Input

RTD transfer clock input

15.3 RTD Related Register

The Table below shows an RTD related register map.

RTD Related Register Map

Address

+0 address

+1 address

See

b7 b8

b15

page

H'0080 077A

(Use inhibited area)

RTD Write Function Disable Register

15-3

(WRRDIS)

15.3.1 RTD Write Function Disable Register

RTD Write Function Disable Register (WRRDIS)

<Address:H'0080 077B>

b15

RTDWR

DIS

Bit Name

Function

8–14

No function assigned. Fix to "0."

RTDWRDIS

0: Enable RTD RAM write function

RTD RAM write function disable bit

1: Disable RTD RAM write function

This register selects whether to enable or disable the RTD function for writing to RAM.

Setting the RTDWRDIS bit to "1" disables the RTD function for writing to RAM, so that even when the RTD

receives a command for write to RAM, the command is ignored and no data is written to RAM.

Note: • Settings of this register cannot be altered while the RTD is in use.

15.2 Pin Functions of RTD

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