h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 318

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 9 I/O Ports
9.6.4
Modes 4 to 6: In modes 4 to 6, port A pins function as address outputs according to the setting of
AE3 to AE0 in PFCR; when they do not function as address outputs, the pins function as SCI I/O
pins and I/O ports.
Port A pin functions in modes 4 to 6 are shown in figure 9-6.
Mode 7: In mode 7, port A pins function as I/O ports and SCI2 I/O pins (SCK2, TxD2, RxD2).
Input or output can be specified for each pin on an individual bit basis. Setting a PADDR bit to 1
makes the corresponding port A pin an output port, while clearing the bit to 0 makes the pin an
input port.
Port A pin functions are shown in figure 9-7.
Rev. 6.00 Feb 22, 2005 page 258 of 1484
REJ09B0103-0600
Pin
PA0/A16
Pin Functions
Selection Method and Pin Functions
The pin function is switched as shown below according to the operating mode,
bits AE3 to AE0 in PFCR, and bit PA0DDR.
Operating mode
AE3 to AE0
PA0DDR
Pin function
Operating mode
PA0DDR
Pin function
Figure 9-6 Port A Pin Functions (Modes 4 to 6)
PA0 input
0
PA0 input
B'0000 to B'1000
0
Modes 4 to 6
PA0 output
Mode 7
1
PA0 output
B'1001 to B'1111
1
A16 output
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