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TOSHIBA
TMP90C840
Table 3.4
State of Pins in STOP Mode
(DRVE bit is set to "0")
1
Pin Name
1
State
1
1--------------------1-------------------------1
- P07/DO - 7
1
P17 / AO - 7
1
P27/A8 - 15 1
P37
1
P43/A16 - 191
POO
P10
P20
P30
P40
P50
P60
P70
P80
P81
P82
P83
NMI
CLK
EA
RESET
Xl
X2
P55
1
P63
1
P73
1
1
1
1
1
1
1
1
1
1
1
High impedance
High impedance
High impedance
High impedance
High impedance
High impedance
Pre-HALT state
Pre-HALT state
Ready for input
High impedance (Note)
High impedance (Note)
High impedance
Ready for input
High impedance
Ready for input
Ready for input
High impedance
"1"
(Note)
P81 and P82 are pulled up slightly in the zero-cross
detection mode.
3.5
Functions of Ports
The TMP90C840 contains total 54 bits input/output ports.
These ports
function
not
only
for
the
general-purpose
I/O
but
also
for
the
input/output of the internal CPU and I/O devices.
Table 3.5 describes
the functions of these ports.
MPU90-54
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