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8XC51SL Datasheet

  • 8XC51SL

  • LOW VOLTAGE 8XC51SL KEYBOARD CONTROLLER

  • 23頁

  • INTEL   INTEL

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8XC51SL LOW VOLTAGE 8XC51SL
KEYBOARD CONTROLLER
80C51SL
81C51SL
CPU with RAM and I O V
CC
e
5V
g
10%
16K ROM Preprogrammed with SystemSoft Keyboard Controller and Scanner
Firmware V
CC
e
5V
g
10%
83C51SL
16K Factory Programmed ROM V
CC
e
5V
g
10%
87C51SL
16K OTP ROM V
CC
e
5V
g
10%
Low Voltage 80C51SL CPU with RAM and I O V
CC
e
3 3V
g
0 3V
Low Voltage 81C51SL 16K ROM Preprogrammed with SystemSoft Keyboard Controller
and Scanner Firmware V
CC
e
3 3V
g
0 3V
Low Voltage 83C51SL 16K Factory Programmed ROM V
CC
e
3 3V
g
0 3V
Low Voltage 87C51SL 16K OTP ROM V
CC
e
3 3V
g
0 3V
Proliferation of 8051 Architecture
Complete 8042 Keyboard Control
Functionality
8042 Style Host Interface
Optional Hardware Speedup of
GATEA20 and RCL
Local 16 x 8 Keyboard Switch Matrix
Support
Two Industry Standard Serial Keyboard
Interfaces Supported via Four High
Drive Outputs
5 LED Drivers
Low Power CHMOS Technology
Y
Y
Y
Y
4-Channel 8-Bit A D
Interface for up to 32 Kbytes of
External Memory
Slew Rate Controlled I O Buffers Used
to Minimize Noise
256 Bytes Data RAM
Three Multifunction I O Ports
10 Interrupt Sources with 6 User-
Definable External Interrupts
2 MHz鈥?16 MHz Clock Frequency
100-Pin PQFP (8XC51SL)
100-Pin SQFP (Low Voltage 8XC51SL)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
The 8XC51SL based on Intel鈥檚 industry-standard MCS 51 microcontroller family is designed for keyboard
control in laptop and notebook PCs The highly integrated keyboard controller incorporates an 8042-style UPI
host interface with expanded memory keyboard scan and power management The 8XC51SL supports both
serial and scanned keyboard interfaces and is available in pre-programmed versions to reduce time to market
The Low Voltage 8XC51SL is the 3 3V version optimized for even further power savings Throughout the
remainder of this document both devices will generally be referred to as 51SL
The 8XC51SL is a pin-for-pin compatible replacement for the 8XC51SL-BG It does however have some
additional functionality Those additional functions are as follows
1 16K OTP ROM The 8XC51SL-BG had only 8K of ROM
2 New Register Set The 8XC51SL adds a second set of host interface registers available for use in support-
ing power management This required an additional address line (A1) for decoding To accommodate this
one V
CC
pin was removed However in order to maintain compatibility with the -BG version an enable bit
for this new register set was added in configuration register 1 This allows the 8XC51SL to be drop in
compatible to existing 8XC51SL-BG designs no software modifications required
NOTE
The changes made to the V
CC
pins require that all three V
CC
pins be properly connected Failing to do so
could result in high leakage current and possible damage to the device
Other brands and names are the property of their respective owners
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鈥檚 Terms and Conditions of Sale for such products Intel retains the right to make
changes to these specifications at any time without notice Microcomputer Products may have minor variations to this specification known as errata
COPYRIGHT
INTEL CORPORATION 1995
November 1994
Order Number 272271-002

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