7733 datasheet(672/940 Pages) RENESAS

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STOP AND WAIT MODES

7735 Group User’s Manual

11–4

Table 11.3.2 Pin state in stop mode

State

Single-chip mode

Memory expansion

Microprocessor mode

mode

Pins

When the standby state

selection bit∗1 = “0”

When the standby state

selection bit∗1 = “1”

s When the signal output

disable selection bit =

“0,” “H” level is output

s When the signal output

disable selection bit =

“1,” “L” level is output.

s When the signal output

disable selection bit =

“0,” “H” level is output.

s When the signal output

disable selection bit =

“1,” “L” level is output.

Same as in the micro-

processor mode

“H” level is output.

____

RDE,

____

WEL,

____

WEH,

____ ____

CS0

–CS4,

_____

RSMP,

_____

HLDA

ALE

A0/D0–A15/D15,

A16, A17

Output levels can be

set. (Refer to section

“11.3.1 Output levels

of external bus and

bus control signals

in stop mode.”)

11.3 Stop mode

“L” level is output.

s When the clock

φ1 output selection

bit*2 = “1”

φ1: “L” level is output.

s When the clock

φ1 output selection

bit = “0”

P42: Retains the same state in which

the STP instruction is executed.

Retains the same

state in which the

STP instruction is

executed.

s When the signal output disable

selection bit*3 = “0”

φ1: “L” level is output.

s When the signal output disable

selection bit = “1”

P42: Bit 2’s value of the port P4 register

is output (Note).

P0 to P8

(not including P42)

: Retains the same

state in which the

STP instruction is

executed.

P43 to P47, P5 to P8

:Retains the same state

in which the STP instruction is executed.

Ports

P42/

φ1

Standby state selection bit*1: Bit 0 at address 6D16 (Refer to Figure 11.3.1.)

Clock

φ1 output selection bit*2: Bit 7 at address 5E16

(Refer to section “12.1 Signals required for accessing external devices.”)

Signal output disable selection bit*3: Bit 6 at address 6C16

(Refer to section “12.1 Signals required for accessing external devices.”)

Note: Make sure to set bit 2 of the port P4 direction register to “1.”

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