85
Pin Functions
Chapter 2
Preliminary User’s Manual U17566EE1V2UM00
2.4.12
Port group 8
Port group 8 is an 8-bit port group. In alternative mode, it comprises pins for
the following functions:
• Clocked Serial Interface CSIB2 data/clock line (SIB2, SOB2, SCKB2)
(µPD70F3424, µPD70F3425, µPD70F3426, µPD70F3427 only)
• LCD controller segment signal output (SEG23 to SEG28, SEG30)
(µPD70(F)3420, µPD70(F)3421, µPD70(F)3422, µPD70F3423 only)
• Frequency output (FOUT)
• UARTA0 transmit/receive data (TXDA0, RXDA0)
Port group 8 includes the following pins:
Note
1.
For pins that support only one alternative output mode, the PFCnm bit is
not available.
2.
The alternative
input
function of UART0 is provided on two pins. Thus you
can select on which pin the alternative function should appear.
Refer to
“Alternative input selection“ on page 50
.
Table 2-38
Port group 8: pin functions and port types
Pin functions in different modes
Pin function
after reset
Port type
Port mode
(PMCnm = 0)
Alternative mode
(PMCnm = 1)
LCD mode
(PLCDCnm = 1)
a
Output mode
(PMnm = 0)
Input mode
(PMnm = 1)
P80 (I/O)
–
SIB2
b
SEG26
a
P80 (I)
M
P81 (I/O)
SOB2
b
–
SEG25
a
P81 (I)
M
P82 (I/O)
SCKB2
b
SCKB2
b
SEG24
a
P82 (I)
M
P83 (I/O)
–
–
SEG23
a
P83 (I)
M
P84 (I/O)
–
–
–
P84 (I)
M
P85 (I/O)
FOUT
–
SEG27
a
P85 (I)
M
P86 (I/O)
TXDA0
–
SEG30
a
P86 (I)
M
P87 (I/O)
–
RXDA0
SEG28
a
P87 (I)
M
a)
µPD70(F)3420, µPD70(F)3421, µPD70(F)3422, µPD70F3423 only
b)
µPD70F3424, µPD70F3425, µPD70F3426, µPD70F3427 only
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