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Intel Corporation
Intel Corporation

80C51GB Datasheet Preview

80C51GB Datasheet

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

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80C51GB pdf
8XC51GB
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
Commercial Express
87C51GB 8 Kbytes OTP 8 Kbytes Internal Program Memory
83C51GB 8 Kbytes Factory Programmable ROM
80C51GB CPU with RAM and I O
8XC51GB 3 5 MHz to 12 MHz g20% VCC
8XC51GB-1 3 5 MHz to 16 MHz g20% VCC
Y 8 Kbytes On-Chip ROM OTP ROM
Y 256 Bytes of On-Chip Data RAM
Y Two Programmable Counter Arrays
with
2 x 5 High Speed Input Output
Channels Compare Capture
Pulse Width Modulators
Watchdog Timer Capabilities
Y Three 16-Bit Timer Counters with
Four Programmable Modes
Capture Baud Rate Generation
(Timer 2)
Y Dedicated Watchdog Timer
Y 8-Bit 8-Channel A D with
Eight 8-Bit Result Registers
Four Programmable Modes
Y Programmable Serial Channel with
Framing Error Detection
Automatic Address Recognition
Y Serial Expansion Port
Y Programmable Clock Out
Y Extended Temperature Range
(b40 C to a85 C)
Y 48 Programmable I O Lines with
40 Schmitt Trigger Inputs
Y 15 Interrupt Sources with
7 External 8 Internal Sources
4 Programmable Priority Levels
Y Pre-Determined Port States on Reset
Y High Performance CHMOS Process
Y TTL and CHMOS Compatible Logic
Levels
Y Power Saving Modes
Y 64K External Data Memory Space
Y 64K External Program Memory Space
Y Three Level Program Lock System
Y ONCE (ON-Circuit Emulation) Mode
Y Quick Pulse Programming Algorithm
Y MCS 51 Microcontroller Fully
Compatible Instruction Set
Y Boolean Processor
Y Oscillator Fail Detect
Y Available in 68-Pin PLCC
MEMORY ORGANIZATION
PROGRAM MEMORY Up to 8 Kbytes of the program memory can reside in the on-chip ROM Also the device
can address up to 64K of program memory external to the chip
DATA MEMORY This microcontroller has a 256 x 8 on-chip RAM In addition it can address up to 64 Kbytes of
external data memory
The Intel 8XC51GB is a single-chip control oriented microcontroller which is fabricated on Intel’s CHMOS III-E
technology The 8XC51GB is an enhanced version of the 8XC51FA and uses the same powerful instruction
set and architecture as existing MCS 51 microcontroller products Added features make it an even more
powerful microcontroller for applications that require On-Chip A D Pulse Width Modulation High Speed I O
up down counting capabilities and memory protection features It also has a more versatile serial channel that
facilitates multi-processor communications
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’s 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 272337-002




Intel Corporation
Intel Corporation

80C51GB Datasheet Preview

80C51GB Datasheet

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

No Preview Available !

80C51GB pdf
8XC51GB
Figure 1 8XC51GB Block Diagram
PROCESS INFORMATION
This device is manufactured on P629 0 a CHMOS
III-E process Additional process and reliability infor-
mation is available in Intel’s Components Quality
and Reliability Handbook Order No 210997
PACKAGES
Part
8XC51GB
Prefix
N
272337 – 1
Package Type
68-Pin PLCC
2




Intel Corporation
Intel Corporation

80C51GB Datasheet Preview

80C51GB Datasheet

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

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80C51GB pdf
8XC51GB
PARALLEL I O PORTS
The 8XC51GB contains six 8-bit parallel I O ports
All six ports are bidirectional and consist of a latch
an output driver and an input buffer Many of the
port pins have multiplexed I O and control functions
Port Pins as Outputs
Port 0 has open drain outputs when it is not serving
as the external data bus The internal pullup is active
only when the pin is outputting a logic 1 during exter-
nal memory access An external pullup resistor is
required on Port 0 when it is serving as an output
port
Ports 1 2 3 4 and 5 have quasi-bidirectional out-
puts A strong pullup provides a fast rise time when
the pin is set to a logic 1 This pullup turns on for two
oscillator periods to drive the pin high and then turns
off The pin is held high by a weak pullup
Writing the P0 P1 P2 P3 P4 or P5 Special Function
Register sets the corresponding port pins All six
port registers are bit addressable
Port Pins as Inputs
The pins of all six ports are configured as inputs by
writing a logic 1 to them Since Port 0 is an open
drain port it provides a very high input impedance
Since pins of Port 1 2 3 4 and 5 have weak pullups
(which are always on) they source a small current
when driven low externally All ports except Port 0
have Schmitt trigger inputs
Port States During Reset
Ports 0 and 3 reset asynchronously to a one and
Ports 1 2 4 and 5 reset to a zero asynchronously
PIN DESCRIPTIONS
The 8XC51GB will be packaged in the 68-lead PLCC
package Its pin assignment is shown in Figure 2
VCC Supply Voltage
VSS Circuit Ground
Diagram is for Pin Reference Only Package Size is Not to Scale
OTP only
Figure 2 Pin Connections
272337 – 2
3




Part Number 80C51GB
Description CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
Maker Intel Corporation
Total Page 22 Pages
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