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HD64F2149YV 数据表(PDF) 268 Page - Renesas Technology Corp |
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HD64F2149YV 数据表(HTML) 268 Page - Renesas Technology Corp |
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268 / 1075 page ![]() Section 8 I/O Ports Rev. 3.00 Jan 18, 2006 page 240 of 1044 REJ09B0280-0300 8.9.3 Pin Functions Port 8 pins also function as SCI1 I/O pins (TxD1, RxD1, SCK1), the IIC1 I/O pin (SCL1), host interface (HIF) I/O pins ( CS2, GA20, HA0, HIFSD), host interface (LPC) I/O pins (PME, GA20, CLKRUN, LPCPD), and interrupt input pins (IRQ5 to IRQ3). The port 8 pin functions are shown in table 8.17. Table 8.17 Port 8 Pin Functions Pin Selection Method and Pin Functions P86/ IRQ5/SCK1/ SCL1 The pin function is switched as shown below according to the combination of bits CKE1 and CKE0 in SCR of SCI1, bit C/ A in SMR of SCI1, bit ICE in ICCR of IIC1, and bit P86DDR. ICE 0 1 CKE1 0 1 0 C/ A 01 — 0 CKE0 0 1 —— 0 P86DDR 0 1 ——— — Pin function P86 input pin P86 output pin SCK1 output pin SCK1 output pin SCK1 input pin SCL1 I/O pin IRQ5 input pin When the IRQ5E bit in IER is set to 1, this pin is used as the IRQ5 input pin. When this pin is used as the SCL1 I/O pin, bits CKE1 and CKE0 in SCR of SCI1 and bit C/ A in SMR of SCI1 must all be cleared to 0. SCL1 is an NMOS- only output, and has direct bus drive capability. P85/ IRQ4/RxD1 The pin function is switched as shown below according to the combination of bit RE in SCR of SCI1 and bit P85DDR. RE 0 1 P85DDR 0 1 — Pin function P85 input pin P85 output pin RxD1 input pin IRQ4 input pin When the IRQ4E bit in IER is set to 1, this pin is used as the IRQ4 input pin. |
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