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Section 8 I/O Ports
Table 8.21 Port A Pin Functions (Modes 1 to 7)
Pin
Pin Functions and Selection Method
PA
/TP
/
Bit PWM0 in TMDR, bits IOB2 to IOB0 in TIOR0, bits TPSC2 to TPSC0 in TCR2 to TCR0 of the 16-bit timer,
3
3
TIOCB
/
bits CKS2 to CKS0 in TCR3 of the 8-bit timer, bit NDER3 in NDERA, and bit PA
0
TCLKD
as follows.
16-bit timer channel 0
settings
PA
DDR
3
NDER3
Pin function
Notes:
1.
2.
16-bit timer channel 0
settings
IOB2
IOB1
IOB0
8-bit timer channel 0
settings
CKS2
CKS1
CKS0
Rev. 4.00 Jan 26, 2006 page 314 of 938
REJ09B0276-0400
(1) in table below
—
—
TIOCB
0
output
TIOCB
input when IOB2 = 1 and PWM0 = 0.
0
TCLKD input when TPSC2 = TPSC1 = TPSC0 = 1 in any of TCR2 to TCR0, or bits CKS2 to
CKS0 in TCR3 are as shown in (3) in the table below.
(2)
0
0
(4)
0
—
—
(2) in table below
0
—
PA
3
input
TIOCB
TCLKD input *
(1)
0
0
1
1
—
1
0
0
1
DDR select the pin function
3
1
1
0
1
PA
TP
3
3
output
output
input *
1
0
2
(2)
1
—
—
(3)
1
—
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