RX610 Group
14. I/O Ports
R01UH0032EJ0120 Rev.1.20
Page 382 of 1006
Feb 20, 2013
14.2.5
Pull-Up Resistor Control Register (PCR)
Value after reset:
Addresses: PA.PCR 0008 C0CAh, PB.PCR 0008 C0CBh, PC.PCR 0008 C0CCh,
PD.PCR 0008 C0CDh, PE.PCR 0008 C0CEh
b7
b6
b5
b4
b3
b2
b1
b0
0
0
0
0
0
0
0
B7
B6
B5
B4
B3
B2
B1
B0
0
Bit
Symbol
Bit Name
Description
R/W
b0
B0
Pm0 Input Pull-Up Resistor Control (m = A to E)
0: Input pull-up resistor is disabled.
1: Input pull-up resistor is enabled.
R/W
b1
B1
Pm1 Input Pull-Up Resistor Control
R/W
b2
B2
Pm2 Input Pull-Up Resistor Control
R/W
b3
B3
Pm3 Input Pull-Up Resistor Control
R/W
b4
B4
Pm4 Input Pull-Up Resistor Control
R/W
b5
B5
Pm5 Input Pull-Up Resistor Control
R/W
b6
B6
Pm6 Input Pull-Up Resistor Control
R/W
b7
B7
Pm7 Input Pull-Up Resistor Control
R/W
Each PCR controls enabling/disabling the input pull-up resistor for individual pins of the corresponding port.
When in input pin state, for the pins corresponding to bits where the value in Pm.PCR is 1, input pull-up resistor is turned
on. Table 14.4 summarizes the input pull-up resistor states.
Table 14.4 Input Pull-Up Resistor States
Port
Pin State
Reset
In Other Operations
Port A
Address output
Disabled
Peripheral module output
Disabled
Port output
Disabled
Port input, peripheral module input
Disabled
Enabled/Disabled
Port B
Address output
Disabled
Peripheral module output
Disabled
Port output
Disabled
Port input, peripheral module input
Disabled
Enabled/Disabled
Port C Address output
Disabled
Peripheral module output
Disabled
Port output
Disabled
Port input, peripheral module input
Disabled
Enabled/Disabled
Port D Data I/O
Disabled
Port output
Disabled
Port input
Disabled
Enabled/Disabled
Port E
Data I/O
Disabled
Port output
Disabled
Port input, peripheral module input
Disabled
Enabled/Disabled
[Legend]
Disabled: Input pull-up resistor is always disabled.
Enabled/Disabled: Input pull-up resistor is enabled when the Bj bit in Pm.PCR (m = A to E, j = 0 to 7) is set to
1, and disabled when the bit is cleared to 0.