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8XC152JB Folha de dados(PDF) 4 Page - Intel Corporation

Nome de Peças 8XC152JB
Descrição Electrónicos  UNIVERSAL COMMUNICATION CONTROLLER 8-BIT MICROCONTROLLER
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Fabricante Electrônico  INTEL [Intel Corporation]
Página de início  http://www.intel.com
Logo INTEL - Intel Corporation

8XC152JB Folha de dados(HTML) 4 Page - Intel Corporation

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8XC152JAJBJCJD
80C152JBJD General Description
The 80C152JBJD is a ROMless extension of the
80C152 Universal Communication controller The
80C152JB has the same five 8-bit IO ports of the
80C152 plus an additional two 8-bit IO ports Port 5
and Port 6 The 80C152JBJD also has two addi-
tional control pins EBEN (EPROM Bus ENable) and
EPSEN (EPROM bus Program Store ENable)
EBEN selects the functionality of Port 5 and Port 6
When EBEN is low these ports are strictly IO simi-
lar to Port 4 The SFR location for Port 5 is 91H and
Port 6 is 0A1H This means Port 5 and Port 6 are not
bit addressable With EBEN low all program memo-
ry fetches take place via Port 0 and Port 2 (The
80C152 is a ROMless only product) When EBEN is
high Port 5 and Port 6 form an addressdata bus
called the E-Bus (EPROM-Bus) for program memory
operations
EPSEN is used in conjunction with Port 5 and Port 6
program memory operations EPSEN functions like
PSEN during program memory operation but sup-
ports Port 5 and Port 6 EPSEN is the read strobe to
external program memory for Port 5 and Port 6
EPSEN is activated twice during each machine cycle
unless an external data memory operation occurs on
Port(s) 0 and Port 2 When external data memory is
accessed the second activation of EPSEN is
skipped which is the same as when using PSEN
Note that data memory fetches cannot be made
through Ports 5 and 6
When EBEN is high and EA is low all program mem-
ory operations take place via Ports 5 and 6 The high
byte of the address goes out on Port 6 and the low
byte is output on Port 5 ALE is still used to latch the
address on Port 5 Next the op code is read on Port
5 The timing is the same as when using Ports 0 and
2 for external program memory operations
Table 1 Program Memory Fetches
EBEN
EA
Program
PSEN
EPSEN
Comments
Fetch via
0
0
P0 P2
Active
Inactive
Addresses 0 – 0FFFFH
0
1
NA
NA
NA
Invalid Combination
1
0
P5 P6
Inactive
Active
Addresses 0 – 0FFFFH
1
1
P5 P6
Inactive
Active
Addresses 0 – 1FFFH
P0 P2
Active
Inactive
Addresses t 2000H
Table 2 8XC152 Product Differences
ROMless
CSMACD
HDLCSDLC
ROM
PLCC
PLCC
5 IO
7 I0
Version
and
Only
Version
and
Only
Ports
Ports
HDLCSDLC
Available
DIP
80C152JA
(83C152JA)
80C152JB
80C152JC
(83C152JC)
80C152JD
NOTES
e
options available
0 standard frequency range 35 MHz to 12 MHz
0‘‘b1’’ frequency range 35 MHz to 165 MHz
4


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