TMP91C824
91C824-36
2008-02-20
Table 3.3.7 Output buffer State Table
Output Buffer State
In HALT mode (IDLE1/STOP)
When the CPU is
Operating
In HALT mode(IDLE2)
Condition A (Note)
Condition B (Note)
Port
Name
Output
Function
Name
During
Reset
When
Used as
function
Pin
When
Used as
Output
Port
When
Used as
function
Pin
When
Used as
Output
Port
When
Used as
function
Pin
When
Used as
Output
Port
When
Used as
function
Pin
When
Used as
Output
Port
D0-D7
–
–
–
–
–
P10-P17 D8-15
OFF
ON upon
external
write
OFF OFF
P20-P27 A16-23
ON ON OFF ON
A0-A15
–
RD
–
WR
–
ON ON
–
ON
–
OFF
–
ON
–
P54(*1)
–
–
–
–
–
P55(*1)
BUSAK
ON ON
OFF
ON
P56(*1)
–
OFF
–
–
–
–
P60
0
CS
P61
1
CS
P62
2
CS
,
A
2
CS
P63
3
CS
P64
EA24
B
2
CS
P65
EA25
C
2
CS
P66
D
2
CS
P67
E
2
CS
ON
P70 SCK
P71(*1)
SDA
SO
OPTTX0
P72(*1) SCL
ON ON OFF ON
PB0
–
–
–
–
–
PB1 TA1OUT
PB2 TA3OUT
ON ON OFF ON
PB3-PB6
–
–
–
–
–
PC0 TXD0
ON
ON
OFF
ON
PC1
–
–
–
–
–
PC2 SCLK0
PC3 TXD1
ON ON OFF ON
PC4
–
–
–
–
–
PC5 SCLK1
OFF
PD5 SCOUT
PD6
ALARM
MLDALM
PD7 MLDALM
ON
PZ2(*1)
HWR
PZ3(*1) R/W
OFF
ON ON
OFF
OFF
ON
ON
X2
–
IDLE1 : ON , STOP : output ”H” level
XT2
–
ON
ON
–
ON
–
IDLE1 : ON , STOP : High-Z
ON: The buffer is always turned on. When the bus is
released, however, output buffers for some pins are
turned off.
*1: Port having a pull-up/pull-down resistor.
OFF: The buffer is always turned off.
-: No applicable
Note: Condition A/B are as follows.
SYSCR2 register setting
HALT mode
<DRVE> <SELDRV>
IDLE1
STOP
0 0
Condition
B
0 1
Condition
A
Condition A
1 0
1 1
Condition B
Condition B