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Intersil Electronic Components Datasheet

CDP1805AC Datasheet

CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer

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TM
March 1997
CDP1805AC,
CDP1806AC
CMOS 8-Bit Microprocessor with On-Chip RAM
and Counter/Timer
Features
• Instruction Time of 3.2µs, -40oC to +85oC
• 123 Instructions - Upwards Software Compatible With
CDP1802
• BCD Arithmetic Instructions
• Low-Power IDLE Mode
• Pin Compatible With CDP1802 Except for Terminal 16
• 64K-Byte Memory Address Capability
• 64 Bytes of On-Chip RAM
• 16 x 16 Matrix of On-Board Registers
• On-Chip Crystal or RC Controlled Oscillator
• 8-Bit Counter/Timer
n
Description
The CDP1805AC and CDP1806AC are functional and per-
formance enhancements of the CDP1802 CMOS 8-bit regis-
ter-oriented microprocessor series and are designed for use
in general-purpose applications.
The CDP1805AC hardware enhancements include a 64-
byte RAM and an 8-bit presettable down counter. The
Counter/Timer which generates an internal interrupt request,
can be programmed for use in timebase, event-counting,
and pulse-duration measurement applications. The
Counter/Timer underflow output can also be directed to the
Q output terminal. The CDP1806AC hardware enhance-
ments are identical to the CDP1805AC, except the
CDP1806AC contains no on-chip RAM.
The CDP1805AC and CDP1806AC software enhancements
include 32 more instructions than the CDP1802. The 32 new
software instructions add subroutine call and return capabil-
ity, enhanced data transfer manipulation, Counter/Timer con-
trol, improved interrupt handling, single-instruction loop
counting, and BCD arithmetic.
Upwards software and hardware compatibility is maintained
when substituting a CDP1805AC or CDP1806AC for other
CDP1800-series microprocessors. Pinout is identical except
for the replacement of VCC with ME on the CDP1805AC and
the replacement of VCC with VDD on the CDP1806AC.
Ordering Information
CDP1805AC
CDP1805ACE
-
CDP1805ACQ
CDP1805ACD
CDP1805ACDX
CDP1806AC
CDP1806ACE
CDP1806ACEX
CDP1806ACQ
CDP1806ACD
-
TEMPERATURE RANGE
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
PACKAGE
Plastic DIP
Burn-In
PLCC
SBDIP
Burn-In
PKG. NO.
E40.6
N44.65
D40.6
CDP1805AC Only
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
1
File Number 1370.2


Intersil Electronic Components Datasheet

CDP1805AC Datasheet

CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer

No Preview Available !

CDP1805AC, CDP1806AC
Pinouts
CDP1805AC, CDP1806AC
(PDIP, SBDIP)
TOP VIEW
CLOCK 1
WAIT 2
CLEAR 3
Q4
SC1 5
SC0 6
MRD 7
BUS 7 8
BUS 6 9
BUS 5 10
BUS 4 11
BUS 3 12
BUS 2 13
BUS 1 14
BUS 0 15
16
N2 17
N1 18
N0 19
VSS 20
40 VDD
39 XTAL
38 DMA IN
37 DMA OUT
36 INTERRUPT
35 MWR
34 TPA
33 TPB
32 MA7
31 MA6
30 MA5
29 MA4
28 MA3
27 MA2
26 MA1
25 MA0
24 EF1
23 EF2
22 EF3
21 EF4
CDP1805AC, CDP1806AC
(PLCC, PACKAGE TYPE Q)
TOP VIEW
SC0
MRD
BUS 7
BUS 6
BUS 5
NC
BUS 4
BUS 3
BUS 2
BUS 1
BUS 0
6 5 4 3 2 1 44 43 42 41 40
7 39
8 38
9 37
10 36
11 35
12 34
13 33
14 32
15 31
16 30
17 29
18 19 20 21 22 23 24 25 26 27 28
MWR
TPA
TPB
MA7
MA6
NC
MA5
MA4
MA3
MA2
MA1
ME for CDP1805AC
VDD for CDP1806AC
Schematic
ADDRESS BUS
IN
CDP1851
PIO
OUT
BUS0 - BUS7
MA0 - MA7 MRD
CONTROL
CDP1805AC WITH
RAM, COUNTER/TIMER
CDP1806AC WITH
COUNTER/TIMER
MWR
TPA
ME
BUS0 - BUS7
MA0 - MA7
CDP1833
1K BYTE ROM
TPA
CEO
BUS0 - BUS7
(CDP1805AC ONLY)
8-BIT DATA BUS
MA0-MA4
MRD
CDP1824
32 BYTE RAM
(USED WITH
CDP1806AC ONLY)
MWR
CS BUS0-BUS4
FIGURE 1. TYPICAL CDP1805AC, CDP1806AC SMALL MICROPROCESSOR SYSTEM
2


Part Number CDP1805AC
Description CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer
Maker Intersil Corporation
PDF Download

CDP1805AC Datasheet PDF






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