87C196(1998) データシートの表示（PDF） - Intel
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87C196 Datasheet PDF : 38 Pages
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87C196CA/87C196CB - Express
Table 2. Pin Descriptions (Sheet 3 of 3)
Name
Description
PORT 0/ACH0–7
EPORT (CB only)
TXCAN
RXCAN
8-bit high impedance input-only port. These pins can be used as digital inputs and/or as
analog inputs to the on-chip A/D converter. These pins are also used as inputs to
EPROM parts to select the Programming Mode.
8-bit bidirectional standard and I/O Port. These bits are shared with the extended
address bus, A16–A19 for CB PLCC. Pin function is selected on a per pin basis.
Push-pull output to the CAN bus line.
High impedance input-only from the CAN bus line.
Table 3. 87C196CB Memory Map
Address
Description
Notes
FFFFFFH
FF2080H
Program Memory - Internal EPROM or External Memory (Determined by EA#
Pin)
FF207FH
FF2000H
Special Purpose Memory - Internal EPROM or External Memory (Determined
by EA# Pin)
FF1FFFH
FF0600H
External Memory
FF05FFH
FF0400H
Internal RAM (Identically Mapped into 00400H±005FFH)
FF03FFH
FF0100H
External Memory
FF00FFH
FF0000H
Reserved for ICE
FEFFFFH
0F0000H
Overlaid Memory (External)
(5)
0EFFFFH
010000H
900 Kbytes External Memory
00FFFFH
002080H
External Memory or Remapped OTPROM (Program Memory)
(1)
00207FH
002000H
External Memory or Remapped OTPROM (Special Purpose Memory)
(1,3)
001FFFH
001FE0H
Memory Mapped Special Function Registers (SFR's)
001FDFH
001F00H
Internal Peripheral Special Function Registers (SFR's)
(5)
001EFFH
001E00H
Internal CAN Peripheral Memory
(5)
001DFFH
001C00H
Internal Register RAM
001BFFH
000600H
External Memory
NOTES:
1. These areas are mapped internal EPROM if the REMAP bit (CCB2.2) is set and EA# = 5 V. Otherwise they
are external memory.
2. Code executed in locations 0000H to 003FFH is forced external.
3. Reserved memory locations must contain 0FFH unless noted.
4. Reserved SFR bit locations must be written with 0.
5. Refer to 8XC196CB User’s Guide for SFR, CAN and Paging Descriptions.
8
ADVANCE INFORMATION Datasheet
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