HD64F3337YCP16V Datasheet, PDF (177/749 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Port 7 Input Data Register (P7PIN)
Bit
7
6
5
4
3
2
1
0
P7₇
P7₆
P7₅
P7₄
P7₃
P7₂
P7₁
P7₀
Initial value
—*
—*
—*
—*
—*
—*
—*
—*
Read/Write
R
R
R
R
R
R
R
R
Note: * Depends on the levels of pins P77 to P70.
When P7PIN is read, the pin states are always read.
P7PIN is a read-only register and cannot be modified.
7.9 Port 8
7.9.1 Overview
Port 8 is a 7-bit input/output port that is multiplexed with host interface (HIF) input pins (HA₀,
GA₂₀, CS₁, IOR, IOW, CS₂), with input/output pins (TxD₁, RxD₁, SCK₁) of serial communication
interface 1, with the I²C clock input/output pin (SCL), and with interrupt input pins (IRQ₅ to
IRQ₃).
Figure 7.16 shows the pin configuration of port 8. The configuration of the pin functions of pins
P8₅ and P8₄ will depend on the value of bit STAC in STCR. Pins P8₆ and P8₃ to P8₀ are unaffected
bit STAC.
Pins in port 8 can drive one TTL load and a 30-pF capacitive load. They can also drive a
darlington pair.
Pin P8₆ can drive a bus buffer. For details, see section 13, I²C Bus Interface.
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