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10.8.3
Pin Functions
Modes 4 to 6: In modes 4 to 6, the corresponding port B pins become address outputs in
accordance with the setting of bits AE3 to AE0 in PFCR. When pins are not used as address
outputs, they function as TPU I/O pins and I/O ports.
Port B pin functions in modes 4 to 6 are shown in figure 10-10.
Mode 7: In mode 7, port B pins function as I/O ports and TPU I/O pins (TIOCA3, TIOCB3,
TIOCC3, TIOCD3, TIOCA4, TIOCB4, TIOCA5, and TIOCB5). Input or output can be specified
for each pin on an individual bit basis. Setting a PBDDR bit to 1 makes the corresponding port B
pin an output port, while clearing the bit to 0 makes the pin an input port.
Port B pin functions in mode 7 are shown in figure 10-11.
PB7
PB6
PB5
PB4
Port B
PB3
PB2
PB1
PB0
Figure 10-10 Port B Pin Functions (Modes 4 to 6)
Port B
Figure 10-11 Port B Pin Functions (Mode 7)
(I/O) / A15 (output) / TIOCB5 (I/O)
(I/O) / A14 (output) / TIOCA5 (I/O)
(I/O) / A13 (output) / TIOCB4 (I/O)
(I/O) / A12 (output) / TIOCA4 (I/O)
(I/O) / A11 (output) / TIOCD3 (I/O)
(I/O) / A10 (output) / TIOCC3 (I/O)
(I/O) / A9 (output) / TIOCB3 (I/O)
(I/O) / A8 (output) / TIOCA3 (I/O)
PB7
(I/O) / TIOCB5 (I/O)
PB6
(I/O) / TIOCA5 (I/O)
PB5
(I/O) / TIOCB4 (I/O)
PB4
(I/O) / TIOCA4 (I/O)
PB3
(I/O) / TIOCD3 (I/O)
PB2
(I/O) / TIOCC3 (I/O)
PB1
(I/O) / TIOCB3 (I/O)
PB0
(I/O) / TIOCA3 (I/O)
373
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