HD6433832S Datasheet, PDF (159/560 Pages) Renesas Technology Corp – single-chip microcomputers

8.3.3 Pin Functions
Table 8.6 shows the port 2 pin functions.
Table 8.6 Port 2 Pin Functions
Pin
P2₇ to P2₂
Pin Functions and Selection Method
Input or output is selected as follows by the bit settings in PCR2.
(n = 2 to 7)
PCR2n
0
1
Pin function
P2_n input pin
P2_n output pin
P2₁/UD
The pin function depends on bit UD in PMR2 and bit PCR2₁ in PCR2.
UD
0
1
PCR2₁
Pin function
0
1
P2₁ input pin P2₁ output pin
*
UD input pin
P2₀/IRQ₄/ADTRG The pin function depends on bit IRQ4 in PMR2, bit TRGE in AMR, and bit
PCR2₀ in PCR2.
IRQ4
0
1
PCR2₀
TRGE
0
1
*
*
0
1
Pin function
P2₀ input pin P2₀ output pin IRQ₄ input pin IRQ₄/ADTRG
input pin
Note: When using as ADTRG input pin, clear bit IEN4 in IENR1 to 0, disabling
IRQ₄ interrupts.
Note: * Don’t care
8.3.4 Pin States
Table 8.7 shows the port 2 pin states in each operating mode.
Table 8.7 Port 2 Pin States
Pins
P2₇ to P2₂
P2₁/UD
P2₀/IRQ₄/
ADTRG
Reset
High-
impedance
Sleep
Retains
previous
state
Subsleep
Retains
previous
state
Standby
High-
impedance
Watch Subactive Active
Retains Functional Functional
previous
state
144