MC68705P5 Microcontroller Datasheet

MC68705P5 Datasheet PDF, Equivalent


Part Number

MC68705P5

Description

8-Bit EPROM Microcontroller

Manufacture

Motorola

Total Page 25 Pages
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MC68705P5
® MOTOROLA
Advance Information
8-BIT EPROM MICROCOMPUTER UNIT
The MC68705P5 Microcomputer Unit (MCU) is an EPROM member
of the M6805 Family of low-cost single-chip microcomputers. The user
programmable EPROM allows program changes and lower volume
applications in comparison to the factory mask programmable versions.
The EPROM versions also reduce the development costs and turn-
around time for prototype evaluation of the mask ROM versions, This
8-bit microcomputer contains a CPU, on-chip CLOCK, EPROM,
bootstrap ROM, RAM, I/O, and a TIMER.
Because of these features, the MC68705P5 offers the user an
economical means of designing an M6805 Family MCU into his system,
either as a prototype evaluation, as a low-volume production run, or a
pilot production run.
HARDWARE FEATURES
• 8-Bit Architecture
• 112 bytes of RAM
• Memory Mapped I/O
• 1804 Bytes of User EPROM
• Internal 8-Bit Timer with 7-Bit Prescaler
• Programmable Prescaler
• Programmable Timer Input Modes
• External Timer Interrupt
• Vectored Interrupts - External, Timer, and Software
• Zero-Cross Detection on INT Input
• 20 TTL/CMOS Compatible Bidirectional I/O Lines (8 Lines are
LED Compatible)
• On-Chip Clock Generator
• Master and Power-On Reset
• Complete Development System Support on EXORciser
• Emulates the MC6805P2 and MC6805P4 (Except for VSB)
• Bootstrap Program in ROM Simplifies EPROM Programming
• EPROM Security Features (Hardware and Software)
SOFTWARE FEATURES
• Similar to M6800 Family
• Byte Efficient Instruction Set
• Easy to Program
• True Bit Manipulation
• Bit Test and Branch Instructions
• Versatile Interrupt Handling
• Versatile Index Register
• Powerful Indexed Addressing for Tables
• Full Set of Conditional Branches
• Memory Usable as Registers/Flags
• Single Instruction Memory Examine/Change
• 10 Powerful Addressing Modes
• All Addressing Modes Apply to EPROM, RAM, and I/O
ThiS document contains mformatlon on a new product Speclflcatlons and Information herein
are subject to change without notice
3·851
MC6870SPS
HMOS
(HIGH-DENSITY, N-CHANNEL
DEPLETION LOAD,
5 V EPROM PROCESS)
8-BIT EPROM
MICROCOMPUTER
S SUFFIX
CERDIP PACKAGE
ALSO AVAILABLE
L SUFFIX
CERAMIC PACKAGE
CASE 719
PIN ASSIGNMENT
VSS
INT
VCC
EXTAL
XTAL
Vpp
TIMER
PCO
PCl
PC2
PC3
PBO
PBl
RESET
PA7
PA6
PA5
PA4
PA3
PA2
PAl
PAO
PB7
PB6
PB5
PB4
PB3
GENERIC INFORMATION
11= 10 MHz, TA=O to 70 C C)
Package Type
Ceramic
L Suffix
Cerdlp
S Suffix
Generic Number
MC68705P5L
MC68705P5S
I

MC68705P5
MC68705P5
TIMER
MC68705P5 HMOS MICROCOMPUTER BLOCK DIAGRAM
PAO
Accumulator
A
Index
Register
X
CPU
Control
Data
Dir
Reg
Port
B
Reg
PBO
PBl
PB2
Port
PB3 B
PB4 I/O
PB5 lines
PB6
PAl
Port PA2
Port Data
Condition
Code
PB7
A PA3
A D,r
Register CC
I/O PA4
Reg Reg
CPU
I Lines PA5
PA6
PA7
1804 X 8
Stack
Pointer
SP
Program
Counter
High PCH
Data Port
Dir C
PCO Port
PCl C
PC2 I/O
AlU
Reg Reg
PC3 lines
EPROM
Program
115 X 8
Bootstrap ROM
Counter
low PCl
MAXIMUM RATINGS
Rating
Supply Voltage
Input Voltage
EPROM Programming Voltage (Vpp Pin)
TIMER Pin
Normal Mode
Bootstrap Programming Mode
All Others
Operating Temperature Range
Storage Temperature Range
Junction Temperature
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance
Ceramic Package
Symbol
VCC
Vpp
Yin
Yin
Yin
TA
Tstg
TJ
Value
-0.3 to + 7.0
-0.3 to + 22.0
-0.3 to + 7.0
-0.3 to + 15.0
-0.3 to + 7.0
o to + 70
-55 to + 150
+ 150
Unit
V
V
V
V
V
DC
DC
DC
ThiS deVice contains circUitry to protect the In-
puts against damage due to high static voltages
or electric fields; however, it IS advised that nor-
mal precautions be taken to aVOid application of
any voltage higher than maximum rated voltages
to this high-Impedance Circuit. For proper opera-
tion It is recommended that Yin and Vout be con-
strained to the range VSS $ (V ,n or Vout) $ VCC
Reliability of operation IS enhanced If unused In-
puts are tied to an appropriate logiC voltage level
le.g., either VSS or VCCI
POWER CONSIDERATIONS
The average chip-junction temperature, TJ, in °c can be obtained from:
TJ = TA + (PD-(lJA)
(1)
Where:
TA"" Ambient Temperature, °c
(I JA "" Package Thermal Resistance, Junction-to-Ambient, °c/W
PO"" PINT + PPORT
PINT"" ICC x VCe. Watts - Chip Internal Power
PPORT"" Port Power Oissipation, Watts - User Oetermined
For most applications PPORT~ PINT and can be neglected. PPORT may become significant if the device is configured to
drive Oarlington bases or sink LEO loads.
An approximate relationship between Po and T J (if PPORT is neglected) is:
Po = K ... (T J + 273°C)
(2)
Solving equations 1 and 2 for K gives:
K = PO-ITA + 273°C) + (lJA-P 0 2
(3)
Where K is a constant pertaining to the particular part. K can be determined from equation 3 by measuring Po (at equilibrium)
for a known T A- USing this value of K the values of Po and T J can be obtained by solving equations (1) and (2) iteratively for any
value of T A.
3-852


Features ® MOTOROLA Advance Information 8-BIT EP ROM MICROCOMPUTER UNIT The MC68705P5 Mi crocomputer Unit (MCU) is an EPROM memb er of the M6805 Family of low-cost sing le-chip microcomputers. The user progra mmable EPROM allows program changes and lower volume applications in compariso n to the factory mask programmable vers ions. The EPROM versions also reduce th e development costs and turnaround time for prototype evaluation of the mask R OM versions, This 8-bit microcomputer c ontains a CPU, on-chip CLOCK, EPROM, bo otstrap ROM, RAM, I/O, and a TIMER. Bec ause of these features, the MC68705P5 o ffers the user an economical means of d esigning an M6805 Family MCU into his s ystem, either as a prototype evaluation , as a low-volume production run, or a pilot production run. HARDWARE FEATURES • 8-Bit Architecture • 112 bytes o f RAM • Memory Mapped I/O • 1804 By tes of User EPROM • Internal 8-Bit Ti mer with 7-Bit Prescaler • Programmab le Prescaler • Programmable Timer Input Modes • External Timer Interrupt • V.
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