7733 Datasheet, PDF (673/940 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER

STOP AND WAIT MODES
11.3 Stop mode
Setting of the output levels for the external bus, chip select signals, and bus control signals (not including RDE)
b7
b0
1 1 1 1 1 1 1 1 ^{Port P0 direction register (address 4 16)}
Port P1 direction register (address 5 16)
Port P2 direction register (address 8 16)
Port P3 direction register (address 9 16)
Must be fixed to “FF 16.”
b7
b0
Port P0 register (address 2 16)
Port P1 register (address 3 16)
Port P2 register (address 6 16)
Port P3 register (address 7 16)
Set output level by the bit which corresponds to each pin.
0: “L” level output
1: “H” level output
• When setting the signal output disable
selection bit to “1” in the microprocessor
mode
• When setting the clock 1output selection
bit to “0” in the memory expansion mode
b7
b0
1
Port P4 direction register (address C 16)
(Note 1)
b7
b0
Port P4 register (address A 16)
0: “L” level output
1: “H” level output
Note 1: This is applied only in the microprocessor mode.
In the memory expansion mode, it may be “0” or “1”
because the I/O port function is selected.
• When setting the signal output disable selection
bit to “0” in the microprocessor mode
• When setting the clock 1 output selection bit to
“1” in the memory expansion mode
Setting of the standby state selection bit to “1”
b7
0
b0
1 Port function control register (address 6D 16)
Standby state selection bit ( Note 2)
Note 2: This bit’s value also affects the pin state in the wait mode.
(Refer to Figure 11.4.1.)
Setting of RDE signal’s output level (Setting of pin P4 2/ 1’s state)
b7
b0
Oscillation circuit control register 0 (address 6C 16)
Signal output disable selection bit ( Note 3)
0: In the stop mode, pin E/RDE outputs “H” level, and pin P4 2/ 1
outputs “L” level.
1: In the stop mode, pin E/RDE outputs “L” level, and pin P4 2/ 1
outputs bit 2’s value of port P4 register.
Note 3: This bit's value also affects the following:
• Output state of bus control signals and others after the stop mode is terminated (Refer to chapter
“12. CONNECTING EXTERNAL DEVICES” )
• Pin state in the wait mode. (Refer to Figure 11.4.1.)
Furthermore, description of pin P4 2/ 1 is applied only in the microprocessor mode.
STP instruction is
executed.
Fig. 11.3.1 Output level setting example in stop mode (Memory expansion or Microprocessor mode)
7735 Group User’s Manual
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