MC1468705G2 MICROCOMPUTER Datasheet

MC1468705G2 Datasheet PDF, Equivalent


Part Number

MC1468705G2

Description

8-BIT EPROM MICROCOMPUTER

Manufacture

Motorola

Total Page 26 Pages
PDF Download
Download MC1468705G2 Datasheet PDF


MC1468705G2
® MOTOROLA
MC1468705G2
Advance Information
8-BIT EPROM MICROCOMPUTER UNIT
The MC1468705G2 Microcomputer Unit (MCU) is an EPROM mem-
ber of the MC146805 CMOS Family of Microcomputers. The user pro-
grammable EPROM allows program changes and lower volume applica-
tions in comparison to the factory mask programmable versions. The
EPROM versions also reduce the development costs and turnaround
time for prototype evaluation of the mask ROM versions. This 8-bit
microcomputer contains on-chip oscillator, CPU, RAM, EPROM, self-
programming bootstrap ROM, I/O, and TIMER.
In addition to power saving STOP and WAIT modes, fully static
design allows operation at frequencies down to dc, further reducing its
already low power consumption. It is a low-power processor designed
for low-end to mid-range applications in the consumer, automotive, in-
dustrial, and communications markets where very low power consump-
tion constitutes an important factor.
The following are the major features of the MC1468705G2 EPROM
MCU.
HARDWARE FEATURES
• Typical Full Speed Operating Power of 20 mW at 5 V
• Typical WAIT Mode Power of 5 mW
• Typical STOP Mode Power of 5 p,W
• Fully Static Operation
• 112 Bytes of On-Chip RAM
• 2106 Bytes of UV Erasable, User Programmable ROM (EPROM)
• 32 Bidirectional I/O Lines
• High Current Drive
• Internal 8~Bit Timer with Software Programmable 7-Bit Prescaler
• External Timer Input
• External and Timer Interrupts
• Master Reset and Power-On Reset
• Single 3 to 5.5 V Supply
• On-Chip Oscillator with RC or Crystal Options Selected by EPROM
Mask Option Register
• Plug-In Compatible with the MC146805G2
• Self-Programming Bootstrap Program in ROM Simplifies EPROM
Programming
SOFTWARE FEATURES
• Similar to the MC6800
• Efficient Use of Program Space
• Versatile Interrupt Handling
• True Bit Manipulation
• Addressing Modes with Indexed Addressing for Tables
• Efficient Instruction Set
• Memory Mapped I/O
• Two Power Saving Standby Modes; WAIT and STOP
• Fully Compatible with M146805 CMOS Family Microcomputers
This document contains Information on a new product Specifications and Information herein
are subject to change without notice
3-1033
CMOS
(HIGH-PERFORMANCE SILICON-GATE)
8-BIT EPROM
M IC ROCOM PUTER
I
L SUFFIX
CERAMIC PACKAGE
CASE 715
PIN ASSIGNMENT
RESET
IRQ
Vpp
PA7
4
PA6
PA5
PA4
PA3
PA2
8
PA1
PAO
10
11
PBO 12
PB1
PB2
PB3
PB4
13
14
15
16
PB5
PB6
PB7
VSS
17
18
19
20
VDD
OSC1
38 OSC2
37 TIMER
36 PD7
35 PD6
34 PD5
33 PD4
32 PD3
31 PD2
30 PD1
29 PDO
28 PCO
27 PC1
26 PC2
25 PC3
24 PC4
23 PC5
22 PC6
21 PC7

MC1468705G2
MC1468705G2
II
TIMER
FIGURE 1 - BLOCK DIAGRAM
RESET IRQ
12
Port
A
1/0
lines
PAO
PAl
PA2
PA3
PA4
PA5
PA6
PAl
Port
B
1/0
lines
PBO
PBl
PB2
PB3
PB4
PB5
PB6
PBl
Port Data
A Dir
Reg Reg
Port Data
B Dir
Reg Reg
Accumulator
8A
Index
Register
X
Condition
Code
Register CC
Stack
POinter
Program
Counter
High PCH
Program
Counter
low PCl
CPU
CPU
Control
AlU
Data
Dir
Reg
Port
C
Reg
Data
Dlr
Reg
Port
D
Reg
PCO
PCl Port
PC2 C
PC3 1/0
PC4 lines
PC5
PC6
PCl
PDO
PDl Port
PD2 D
PD3 1/0
PD4 lines
PD5
PD6
PDl
Bootstrap
ROM
Vpp
MAXIMUM RATINGS (Voltages Referenced to VSS)
Ratings
Symbol
Value
Supply Voltage
VDD
-0.3 to +5.5
Input Voltage
Vin VSS-0.3 to VDD+0.3
EPROM Programming Voltage (Vpp Pin)
Current Drain Per Pin
Vin
-0.3 to -13.5
Excluding VDD, VSS, and Vpp
Vpp
Operating Temperature Range
I 10
-30
TA o to 10
Storage Temperature Range
Current Drain Total (PD4-PD7 Only)
Tstg
10H
-55 to + 150
40
Unit
V
V
V
mA
mA
°C
°C
mA
THERMAL CHARACTERISTICS
Characteristics
Thermal Resistance
Ceramic
This device contains circuitry to protect
the inputs against damage due to high
static voltages of electric fields; however,
it is advised that normal precautions be
taken to avoid application of any voltage
higher than maximum rated voltages to
this high impedance circuit. For proper
operation it is recommended that Vin and
Vout be constrained to the range
VSSs(Vin or Vout)SVDD. Reliability of
operation is enhanced if unused inputs
except OSC2 and Vpp are connected to
an appropriate logic voltage level (e.g.,
either VSS or VDD). Be sure that the
EPROM window is shielded from light
with an opaque cover at all times except
when erasing.
3-1034


Features ® MOTOROLA MC1468705G2 Advance Inform ation 8-BIT EPROM MICROCOMPUTER UNIT Th e MC1468705G2 Microcomputer Unit (MCU) is an EPROM member of the MC146805 CMOS Family of Microcomputers. The user pro grammable EPROM allows program changes and lower volume applications in compar ison to the factory mask programmable v ersions. The EPROM versions also reduce the development costs and turnaround t ime for prototype evaluation of the mas k ROM versions. This 8-bit microcompute r contains on-chip oscillator, CPU, RAM , EPROM, selfprogramming bootstrap ROM, I/O, and TIMER. In addition to power s aving STOP and WAIT modes, fully static design allows operation at frequencies down to dc, further reducing its alrea dy low power consumption. It is a low-p ower processor designed for low-end to mid-range applications in the consumer, automotive, industrial, and communicat ions markets where very low power consu mption constitutes an important factor. The following are the major features of the MC1468705G2 EPROM M.
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