AT89C5131-S3SIL Atmel, AT89C5131-S3SIL Datasheet - Page 84
AT89C5131-S3SIL
Manufacturer Part Number
AT89C5131-S3SIL
Description
IC 8051 MCU FLASH 32K USB 52PLCC
Manufacturer
Atmel
Series
AT89C513xr
Datasheet
1.AT89C5131-S3SIL.pdf
(176 pages)
Specifications of AT89C5131-S3SIL
Core Processor
C52X2
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
LED, POR, PWM, WDT
Number Of I /o
34
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
52-PLCC
For Use With
AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-05 - KIT STARTER FOR AT89C5131
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 84 of 176
- Download datasheet (3Mb)
Keyboard Interface
Introduction
Description
Interrupt
84
AT89C5131
The AT89C5131 implements a keyboard interface allowing the connection of a 8 x n
matrix keyboard. It is based on 8 inputs with programmable interrupt capability on both
high or low level. These inputs are available as an alternate function of P1 and allow to
exit from idle and power down modes.
The keyboard interface communicates with the C51 core through 3 special function reg-
isters: KBLS, the Keyboard Level Selection register (Table 71), KBE, The Keyboard
interrupt Enable register (Table 70), and KBF, the Keyboard Flag register (Table 69).
The keyboard inputs are considered as 8 independent interrupt sources sharing the
same interrupt vector. An interrupt enable bit (KBD in IE1) allows global enable or dis-
able of the keyboard interrupt (see Figure 37). As detailed in Figure 38 each keyboard
input has the capability to detect a programmable level according to KBLS.x bit value.
Level detection is then reported in interrupt flags KBF.x that can be masked by software
using KBE.x bits.
This structure allow keyboard arrangement from 1 by n to 8 by n matrix and allow usage
of P1 inputs for other purpose.
Figure 37. Keyboard Interface Block Diagram
Figure 38. Keyboard Input Circuitry
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P1:x
Input Circuitry
Input Circuitry
Input Circuitry
Input Circuitry
Input Circuitry
Input Circuitry
Input Circuitry
Input Circuitry
Vcc
Internal Pull-up
KBLS.x
0
1
KBF.x
KBD
IE1.0
KBE.x
Keyboard Interface
Interrupt Request
KBDIT
4136B–USB–09/03
Related parts for AT89C5131-S3SIL
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
8-bit Flash Microcontroller With Full Speed Usb Device At89c5131
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
IC 8051 MCU FLASH 32K USB 28SOIC
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller with Full Speed USB Device
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
KIT STARTER FOR AT89C5131
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC 8051 MCU FLASH 32K USB 48QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC 8051 MCU FLASH 32K USB 64VQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
DEV KIT FOR AVR/AVR32
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet: