KB3920 Просмотр технического описания (PDF) - Unspecified

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Компоненты Описание

производитель

KB3920

Keyboard Controller

Unspecified 

89h

8Ah

8Bh

8Ch

8Dh

90h

91h~97h

98h

99h

KB3920 Keyboard Controller Datasheet

TMOD

TL0

TL1

TH0

TH1

P1IE

SCON

SBUF

4

R/W TR0 Time 0 run control bit.

3 R/WC IE1 External Interrupt 1 edge detected flag.

2

R/W IT1 Interrupt 1 falling edge / low active control bit

1 R/WC IE0 External Interrupt 0 edge detected flag.

0

R/W IT0 Interrupt 0 falling edge / low active control bit

Processor Control Register

7

R/W GATE1 Gating control of TR1 and INT1.

6

R/W CT1 =0, be a timer 1. =1, be a counter 1.

=0, Timer 1 is 13-bit timer (8048 timer).

5~4

R/W

TM1

=1, Timer 1 is 16-bit timer

=2, Timer 1 is 8-bit auto-reload timer

=3, Timer 1 is stop.

00h

3

R/W GATE0 Gating control of TR0 and INT0.

2

R/W CT0 =0, be a timer 0. =1, be a counter 0.

=0, Timer 0 is 13-bit timer (8048 timer).

0~1

R/W

TM0

=1, Timer 0 is 16-bit timer

=2, Timer 0 is 8-bit auto-reload timer

=3, Timer 0 TL0, TH0 is two 8-bit timer.

Timer 0 Low Byte

00h

7 ~ 0 R/W Timer 0 Low Byte

Timer 1 Low Byte

00h

7 ~ 0 R/W Timer 1 Low Byte

Timer 0 High Byte

00h

7 ~ 0 R/W Timer 0 High Byte

Timer 1 Low Byte

00h

7 ~ 0 R/W Timer 1 High Byte

Port 1 IE

00h

7 ~ 0 R/W P1 Interrupt Enable Register

NA Reserved

00h

Serial Port Control Register

Serial Port Mode:

00: 8-bit shift register mode, E51RX should be E51CLK shift

7~6

R/W

SM1 clock.

SM0 01: 8-bit Serial Port (variable)

10: 9-bit Serial Port (variable)

11: 9-bit Serial Port (variable)

5

NA

Reserved

00h

4

R/W REN Enable Serial Port reception

3

R/W TB8 The 9th bit of transmitted in mode 2 & 3.

2

R/W RB8 The 9th bit of received.

1 R/WC TI Transmit Interrupt flag.

0 R/WC RI Receive Interrupt flag.

Serial Port Data Buffer

00h

7 – 0 R/W Serial port data buffer

Copyright©2006, ENE Technology Inc.

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