MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Addresses FFD216 to FFFF16 are the RESET and interrupt vector
addresses and contain the interrupt vectors. Refer to the section on
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.
interrupts for details.
The 2048-byte area from addresses 8016 to 87F16 contains the inter-
nal RAM. In addition to storing data, the RAM is used as stack during
a subroutine call, or interrupts.
Assigned to addresses 016 to 7F16 are peripheral devices such as
I/O ports, A-D converter, D-A converter, UART, timer, and interrupt
control registers.
MEMORY
The memory map is shown in Figure 1. The address space is 16
Mbytes from addresses 016 to FFFFFF16. The address space is di-
vided into 64-Kbyte units called banks. The banks are numbered
from 016 to FF16.
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 016
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 ROM, internal RAM, and control registers for internal periph-
eral devices are assigned to bank 016.
The 60-Kbyte area from addresses 100016 to FFFF16 is the internal
ROM.
00000016
00000016
00007F16
00008016
00000016
Peripherai devices
control registers
Bank 016
see Fig. 2 for
further information
Internal RAM
2048 bytes
00007F16
00FFFF16
01000016
00087F16
00100016
Interrupt vector table
00FFD216
INT4
Bank 116
INT3
A–D
•
•
•
•
•
•
•
•
•
•
•
•
•
01FFFF16
UART1 transmit
UART1 receive
UART0 transmit
UART0 receive
Timer B2
Timer B1
Timer B0
Internal ROM
60 Kbytes
Timer A4
Timer A3
Timer A2
Timer A1
Timer A0
FE000016
Bank FE16
INT2
INT1
FEFFFF16
FF000016
INT0
Watchdog timer
DBC
BRK instruction
Zero divide
Bank FF16
00FFFE16
RESET
00FFFF16
FFFFFF16
Note: Internal ROM area can be modified. (Refer to the section on ROM area modification function.)
Fig. 1 Memory map
7
RENESAS [ RENESAS TECHNOLOGY CORP ]
