ST72361 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST72361' PDF : 224 Pages View PDF
ST72361
3 REGISTER AND MEMORY MAP
As shown in Figure 5, the MCU is capable of ad-
dressing 64 Kbytes of memories and I/O registers.
The available memory locations consist of 128
bytes of register locations, up to 2 Kbytes of RAM
and up to 60 Kbytes of user program memory.
Figure 5. Memory Map
The RAM space includes up to 256 bytes for the
stack from 0100h to 01FFh.The highest address
bytes contain the user reset and interrupt vectors.
IMPORTANT: Memory locations marked as “Re-
served” must never be accessed. Accessing a re-
seved area can have unpredictable effects on the
device.
0000h
007Fh
0080h
HW Registers
(see Table 3)
RAM
(2048/1536 bytes)
087Fh
0880h
0FFFh
1000h
FFDFh
FFE0h
FFFFh
Reserved
Program Memory
(60K, 48K, 32K, 16K)
Interrupt & Reset Vectors
(see Table 9)
0080h
00FFh
0100h
01FFh
0200h
067Fh
or 087Fh
Short Addressing
RAM (zero page)
256 bytes Stack
16-bit Addressing
RAM
1000h
4000h
8000h
C000h
60 Kbytes
48 Kbytes
32 Kbytes
16 Kbytes
FFDFh
Table 3. Hardware Register Map
Address
Block
Register
Label
Register Name
0000h
0001h
0002h
0003h
0004h
0005h
0006h
0007h
0008h
0009h
000Ah
000Bh
000Ch
000Dh
000Eh
Port A
Port B
Port C
Port D
Port E
PADR
PADDR
PAOR
PBDR
PBDDR
PBOR
PCDR
PCDDR
PCOR
PDDR
PDDDR
PDOR
PEDR
PEDDR
PEOR
Port A Data Register
Port A Data Direction Register
Port A Option Register
Port B Data Register
Port B Data Direction Register
Port B Option Register
Port C Data Register
Port C Data Direction Register
Port C Option Register
Port D Data Register
Port D Data Direction Register
Port D Option Register
Port E Data Register
Port E Data Direction Register
Port E Option Register
Reset
Status
00h1)
00h
00h
00h1)
00h
00h
00h1)
00h
00h
00h1)
00h
00h
00h1)
00h
00h
Remarks
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
R/W2)
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