Rev. 2.0, 11/00, page 253 of 1037
TE
PCR21
Pin Function
0
P21 input pin
0
1
P21 output pin
1
*
SO1 output pin
Note:
*
Don't care.
(8) P20/SI1
P20/SI1 is switched as shown below according to the PCR20 bit in PCR2 and the RE bit in
SCR.
RE
PCR20
Pin Function
0
P20 input pin
0
1
P20 output pin
1
*
SI1 input pin
Note:
*
Don't care.
11.4.4
Pin States
Table 11.10 shows the port 2 pin states in each operation mode.
Table 11.10 Port 2 Pin States
Pins
Reset
Active
Sleep
Standby
Watch
Subactive
Subsleep
P27/SCK2
P26/SO2
P25/SI2
P24/SCL
P23/SDA
P22/SCK1
P21/SO1
P20/SI1
High-
impedance
Operation
Holding
High-
impedance
High-
impedance
Operation
Holding
Note: If the SCK1, SCK2, SI1, and SI2 input pins are set, the pin level needs be set to the high
or low level regardless of the active mode and low power consumption mode. Note that
the pin level must not reach an intermediate level.
Summary of Contents for Hitachi H8S/2191
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