H8SLASH3021 datasheet(183/712 Pages) RENESAS

183 / 712 page

7. I/O Ports

Rev.2.00 Mar. 22, 2007 Page 159 of 684

REJ09B0352-0200

7.8

Port 8

7.8.1

Overview

Port 8 is a 2-bit input/output port that is also used for

IRQ

1 and IRQ0 input. Figure 7.20 shows the

pin configuration of port 8.

Pin P8

0 functions as input/output pin or as an IRQ0 input pin. Pins P81 function as either input pins

IRQ

1 input pins in modes 1, 3, 5, and 6, and as input/output pins or IRQ1 input pins in mode 7.

Pins in port 8 can drive one TTL load and a 90-pF capacitive load. They can also drive a

Darlington transistor pair. Pins P8

1 and P80 have Schmitt-trigger inputs.

Port 8

Port 8 pins

P81 (input)/IRQ1 (input)

P80 (input/output)/IRQ0 (input)

Modes 1, 3, 5, and 6

P81/IRQ1

P80/IRQ0

P81 (input/output)/IRQ1 (input)

P80 (input/output)/IRQ0 (input)

Mode 7

Figure 7.20 Port 8 Pin Configuration

7.8.2

Table 7.11 summarizes the registers of port 8.

Table 7.11

Port 8 Registers

Address*

Name

Abbreviation

R/W

Initial Value

H'FFCD

Port 8 data direction register

P8DDR

H'E0

H'FFCF

Port 8 data register

P8DR

R/W

H'E0

Note:

Lower 16 bits of the address.

H8/3021 Datasheet(PDF) 183 Page - Renesas Technology Corp

H8/3021 Datasheet(HTML) 183 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