HD6432138SW datasheet(274/1061 Pages) RENESAS

274 / 1061 page

Section 8 I/O Ports

Rev. 4.00 Jun 06, 2006 page 220 of 1004

REJ09B0301-0400

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 8.12.

Table 8.12

Port 5 Pin Functions

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

CKE1

—

CKE0

——

P52DDR

——

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.

In the H8S/2138 Group, 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.

P51DDR

—

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.

P50DDR

—

Pin function

P50 input pin

P50 output pin

TxD0 output pin

HD6432138SW Datasheet(PDF) 274 Page - Renesas Technology Corp

HD6432138SW Datasheet(HTML) 274 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL