M37754 Mitsubishi, M37754 Datasheet - Page 7

• Manufacturer Part Number: M37754
• Description: SINGLE-CHIP 16BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

BASIC FUNCTION BLOCKS
The M37754M8C-XXXGP contains the following devices on a single
chip: ROM, RAM, CPU, bus interface unit, timers, UART, A-D con-
verter, D-A converter, I/O ports, clock generating circuit and others.
Each of these devices is described below.
MEMORY
The memory map is shown in Figure 1. The address space is 16
Mbytes from addresses 0
vided into 64-Kbyte units called banks. The banks are numbered
from 0
Internal ROM, internal RAM, and control registers for internal periph-
eral devices are assigned to bank 0
The 60-Kbyte area from addresses 1000
ROM.
Fig. 1 Memory map
16
to FF
Bank 0
Bank 1
Bank FE
Bank FF
Note: Internal ROM area can be modified. (Refer to the section on ROM area modification function.)
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•
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16
.
16
16
16
16
FEFFFF
FFFFFF
00FFFF
01FFFF
FE0000
FF0000
000000
010000
16
to FFFFFF
16
16
16
16
16
16
16
16
16
.
16
16
. The address space is di-
to FFFF
16
M37754M8C-XXXGP, M37754M8C-XXXHP
is the internal
00FFFF
00007F
00087F
000000
000080
001000
16
16
16
16
16
16
Addresses FFD2
addresses and contain the interrupt vectors. Refer to the section on
interrupts for details.
The 2048-byte area from addresses 80
nal RAM. In addition to storing data, the RAM is used as stack during
a subroutine call, or interrupts.
Assigned to addresses 0
I/O ports, A-D converter, D-A converter, UART, timer, and interrupt
control registers.
Additionally the internal ROM area can be modified by software.
Refer to the section on ROM area modification function for details.
A 256-byte direct page area can be allocated anywhere in bank 0
using the direct page register DPR. In direct page addressing mode,
the memory in the direct page area can be accessed with two words
thus reducing program steps.
Internal RAM
Internal ROM
M37754S4CGP, M37754S4CHP
2048 bytes
60 Kbytes
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
16
to FFFF
MITSUBISHI MICROCOMPUTERS
16
to 7F
00007F
16
00FFD2
00FFFE
000000
are the RESET and interrupt vector
16
16
16
16
16
are peripheral devices such as
16
Interrupt vector table
see Fig. 2 for
further information
Peripherai devices
to 87F
control registers
UART1 transmit
UART0 transmit
Watchdog timer
BRK instruction
UART1 receive
UART0 receive
Zero divide
Timer B2
Timer B1
Timer B0
Timer A4
Timer A3
Timer A2
Timer A1
Timer A0
RESET
INT
INT
A–D
INT
INT
INT
DBC
16
4
3
2
1
0
contains the inter-
16
7