Intel Corporation P83C51KB Datasheet

Information in this document is provided in connection with Intel products. Intel assumes no liability whatsoever, including infringement of
any patent or copyright, for sale and use of Intel products except as provided in Intel’s Terms and Conditions of Sale for such products.
Intel retains the right to make changes to these specifications at any time, without notice. Microcontroller products may have minor varia­tions to this specification known as errata.
COPYRIGHT © INTEL CORPORATION, 1996 March 1996 Order Number: 272800-001

83C51KB

HIGH PERFORMANCE

KEYBOARD MICROCON TRO LLER

The 83C51KB is a highly integrated keyboard microcontroller for the standard and advanced desktop
keyboard industry. The integration of external components into the microcont roller reduces overall keyboard
control system manufactur ing cost in terms of the number of components used, the amount of PCB space
required, reduced inventory, and a reduction in required assembly activities. In addition, the integration
reduces the number and amount of software routines needed for signal debounce and input status poll
operation. There is a resultant reduction in CPU overhead as well as on-chip memory requirements. The
83C51KB product line is manufactured w ith Intel state of the art complimentary high-p erformance metallic
oxide semiconductor (CHMOS) design rules.

■ Direct Drive LED Outputs

—Four Pins (P3.7:4)
—13 mA Typical Current Sink

Capability

■ 20 pF Cap On-chip for RC Resonator

—Frequency Selectable (4-6 MHz)

■ 8 Dedicated Key Scan Input (KSI) Pins

—Schmitt-trigger Inputs
—External Interrupt
—Level Detect Interrupt Mode for

Automatic Power-down Exit

■ 16 Dedicated Key Scan Output (KSO)

Pins with Quasi-bidirectional Port
Drivers

—No External Resistor Required
—Located on P0.7:0 and P2.7:0

■ 4-Kbyte On-chip ROM Memory

■ 128-byte On-chip RAM Memory

■ Clock/Data Drivers to Motherboard

—Strong Pullup Drivers for Keyboard

Cable Communication
—8X42 Compatible Interface
—Selectable external interrup t for

Clock

■ ONCE mode (On-chip Emulation)

■ Power-on Reset Mode

—Automatic Operation

■ 5 Volt D.C. Operation

■ Reduces Manufacturing Cost by

Reducing Overall Component Count

■ Configurable Timer (16 bit or 2 by 8 Bit)

■ Uses Industry Standard Design Tools

■ Control Oriented Instruction Set

■ Industry Standard Architecture

2

83C51KB HIGH PERFORMANCE KEYBO ARD M ICRO CO NT RO L LE R

Figure 1. 83C51KB Block Diagram

Port 0

Drivers

KSO 0–7

P0.0 – P0.7

Port 0

Latch

Port 0

Drivers

KSO 8–15

P2.0 – P2.7

Port 2

Latch

ROM

Program

Address

Register

Buffer

RAM

Address Register

RAM

ACC

TMP2

Stack

Pointer

PC

Incrementer

Program

Counter

DPTR

TMP1

A3350-01

CLK, Data, LED 0–3

P3.0 – P3.7

ALU

PSW

Timing

and

Control

Instruction

Register

Power On
Reset Ctrl.

B

Register

SFRs
Timer

Port 3

Latch

Port 3

Drivers

KSI 0–7

P1.0 – P1.7

Port 1

Latch

Port 1

Drivers

RC

Osc.

RST

PSEN#

ALE
EA#

V

CC

V

SS

V

CC

3

83C51KB HIGH PERFORMANCE KEYBOARD MICROCONTROLLER

1.0 TEMPERATURE RANGE

With the commercial (standard) temperature
marking, this product line operates over the temper­ature range 0°C to +70°C.

2.0 PROCESS INFORMATION

This device is manufactured on a complimentary
high-performance metal-oxide semiconductor
(CHMOS) process. Additional process and reliability
information is available in Intel’s

Components

Quality and Reliability Handbook

(order number

210997).

All thermal impedance data is approximate for static
air conditions at 1 watt of power dissipat ion. Values
change depending on operating conditions and
application requirements. The Intel

Packaging

Handbook

(order number 240800) describes Intel’s

thermal impedance test methodology.

Table 1. Thermal Characteristics

Package Type θ

JA

θ

JC

40-lead PDIP 70°C/W 25°C/W

3.0 83C51KB PACKAGE INFORMATION

The 83C51KB Family Nomenclature

Program-memory Options

XXXXX XXXX8XXX

Packaging Options

Temperature and Burn-in Options

A2815-01

Process Information

Product Family

Device Speed

4

83C51KB HIGH PERFORMANCE KEYBO ARD M ICRO CO NT RO LLE R

Figure 2. 83C51KB 40-pin DIP Diagram

Table 2. 83C51KB Nomenclature Definitions

Parameter Options Description

Temperature and Burn-in
Options

no mark Commercial operating temperature range (0°C to 70°C) with

Intel standard burn-in.
Packaging Options P Plastic Dual-in-line Package (PDIP)
Program Memory Options 3 F act ory progra mm ed ROM
Process Information C CHMOS
Product Family 51 MCS 51 Compatible Product Family
Device Memory Options KB 128 bytes RAM

4 Kbytes ROM
Device Speed no mark 4-6 MHz

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

P83C51KB

View of

component

as mounted

on PC board

A4248-01

P1.0/KSI0
P1.1/KSI1
P1.2/KSI2
P1.3/KSI3
P1.4/KSI4
P1.5/KSI5
P1.6/KSI6
P1.7/KSI7

RST

P3.0/DATA

P3.1
P3.2/CLK0/INT0#
P3.3/CLK1/INT1#

P3.4/LED0/T0

P3.5/LED1

P3.6/LED2/WR#

P3.7/LED3/RD#

NC

RCIN

V

SS

VCC
P0.0/KSO0/AD0
P0.1/KSO1/AD1
P0.2/KSO2/AD2
P0.3/KSO3/AD3
P0.4/KSO4/AD4
P0.5/KSO5/AD5
P0.6/KSO6/AD6
P0.7/KSO7/AD7
EA#
ALE
PSEN#
P2.7/KSO15/A15
P2.6/KSO14/A14
P2.5/KSO13/A13
P2.4/KSO12/A12
P2.3/KSO11/A11
P2.2/KSO10/A10
P2.1/KSO9/A9
P2.0/KSO8/A8

5

83C51KB HIGH PERFORMANCE KEYBOARD MICROCONTROLLER

4.0 83C51KB MEMORY

Table 3. 83C51KB Memory Map

Code
Memory

Description Notes

FFFFH
0000H

External code memory

4

0FFFH
0000H

4-Kbyte on-chip code memory array.

Data
Memory

Description

FFFFH
0000H

External data memory

2, 3

00FFH
0080H

Special function registers

1

007FH
0020H

On-chip RAM

5

001FH
0000H

4 banks of general purpose registers, R0-R7

NOTE:

1. The special function registers (SFRs) are accessible by direct addressing only.

2. Data in this area is accessible by indirect addressing only.

3. RD#/WR# active for these external data addresses.

4. PSEN# active for the external code addresses.

5. Addresses 20H through 2FH are bit addressable.

6

83C51KB HIGH PERFORMANCE KEYBO ARD M ICRO CO NT RO L LE R

5.0 SIGNAL DESCRIPTION

Table 4. 40-pin DIP Signals Arranged by Name

Keyboard Keyboard

Name Pin Name Pin

P0.7/KSO7/AD7 32 P 1.0/KSI0 1
P0.6/KSO6/AD6 33 P1.1/KSI1 2
P0.5/KSO5/AD5 34 P1.2/KSI2 3
P0.4/KSO4/AD4 35 P1.3/KSI3 4
P0.3/KSO3/AD3 36 P1.4/KSI4 5
P0.2/KSO2/AD2 37 P1.5/KSI5 6
P0.1/KSO1/AD1 38 P1.6/KSI6 7
P0.0/KSO0/AD0 39 P1.7/KSI7 8
P2.7/KSO15/A15 28 P3.0/DATA 10
P2.6/KSO14/A14 27 P3.1 11
P2.5/KSO13/A13 26 P3.2/CLK0/INT0# 12
P2.4/KSO12/A12 25 P3.3/CLK1/INT1# 13
P2.3/KSO11/A11 24 P3.4/LED0/T0 14
P2.2KSO10/A10 23 P3.5/LED1 15
P2.1/KSO9/A9 22 P3.6/LED2/WR# 16
P2.0/KSO8/A8 21 P3.7/LED3/RD# 17

Chip Control

Name Pin

RCIN 19
RST 9 Power & Ground
ALE 30 Name Pin
PSEN# 29 V

CC

40

EA# 31

V

SS

20