P80C592FFA View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
P80C592FFA Datasheet PDF : 108 Pages
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Philips Semiconductors
8-bit microcontroller with on-chip CAN
Product specification
P8xC592
7.1 Program Memory
The Program Memory of the P8xC592 consists of 16 kbytes ROM on-chip, externally expandible up to 64 kbytes.
Table 3 Instruction fetch controlled by EA
PIN EA (note 1)
DURING RESET
LATCHED TO:
AFTER RESET
INSTRUCTIONS FETCHED FROM:
H
−
internal Program Memory (note 2)
H
−
external Program Memory
L
−
−
‘don’t care’
−
ADDRESS
LOCATION
0000H → 3FFFH
4000H → FFFFH
0000H → FFFFH
−
Notes
1. This implementation prevents reading of the internal program code by switching from external Program Memory
during a MOVC instruction.
2. By setting a security bit the internal Program Memory content is protected, which means it cannot be read out.
If the security bit has been set to LOW there are no restrictions for the MOVC instruction.
7.2 Internal Data Memory
The internal Data Memory is physically built-up and accessible as shown in Table 4 (see Fig.5).
Table 4 Internal Data Memory size and address mode
INTERNAL
DATA MEMORY
SIZE
LOCATION
MAIN RAM
(note 1)
AUXILIARY RAM
(note 2)
SFRs (note 3)
256 bytes
256 bytes
128 bytes
0 to 127
128 to 255
0 to 255
128 to 255
ADDRESS MODE
DIRECT INDIRECT
POINTERS
X
X
address pointers are R0 and R1 of the
−
X
selected register bank
−
X
address pointers are R0 and R1 of the
selected register bank and the DPTR
X
−
−
Notes
1. MAIN RAM can be addressed directly and indirectly as in the 80C51.
2. AUXILIARY RAM (0 to 255):
a) Is indirectly addressable in the same way as the external Data Memory with MOVX instructions.
b) Access will not affect the ports P0, P2, P3.6 and P3.7 during internal program execution.
3. SFRs = Special Function Registers.
1996 Jun 27
11
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