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HD64F2149YV 数据表(PDF) 256 Page - Renesas Technology Corp |
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HD64F2149YV 数据表(HTML) 256 Page - Renesas Technology Corp |
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256 / 1075 page  Section 8 I/O Ports Rev. 3.00 Jan 18, 2006 page 228 of 1044 REJ09B0280-0300 8.6.3 Pin Functions Port 5 pins also function as SCI0 I/O pins (TxD0, RxD0, SCK0) and the IIC0 I/O pin (SCL0). The port 5 pin functions are shown in table 8.11. Table 8.11 Port 5 Pin Functions Pin Selection Method and Pin Functions P52/SCK0/SCL0 The pin function is switched as shown below according to the combination of bits CKE1 and CKE0 in SCR of SCI0, bit C/ A in SMR of SCI0, bit ICE in ICCR of IIC0, and bit P52DDR. ICE 0 1 CKE1 0 1 0 C/ A 01 — 0 CKE0 0 1 —— 0 P52DDR 0 1 —— —— Pin function P52 input pin P52 output pin SCK0 output pin SCK0 output pin SCK0 input pin SCL0 I/O pin When this pin is used as the SCL0 I/O pin, bits CKE1 and CKE0 in SCR of SCI0 and bit C/ A in SMR of SCI0 must all be cleared to 0. SCL0 is an NMOS open-drain output, and has direct bus drive capability. When set as the P52 output pin or SCK0 output pin, this pin is an NMOS push- pull output. P51/RxD0 The pin function is switched as shown below according to the combination of bit RE in SCR of SCI0 and bit P51DDR. RE 0 1 P51DDR 0 1 — Pin function P51 input pin P51 output pin RxD0 input pin P50/TxD0 The pin function is switched as shown below according to the combination of bit TE in SCR of SCI0 and bit P50DDR. TE 0 1 P50DDR 0 1 — Pin function P50 input pin P50 output pin TxD0 output pin |
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