MITSUBISHI MICROCOMPUTERS
M37733S4LHP
16-BIT CMOS MICROCOMPUTER
BASIC FUNCTION BLOCKS
The 2048-byte area allocated to addresses from 8016 to 87F16 is the
built-in RAM. In addition to storing data, the RAM is used as stack
during a subroutine call or interrupts.
The M37733S4LHP has the same functions as the
M37733MHBXXXFP except for the following :
(1) The memory map is different.
Peripheral devices such as I/O ports, A-D converter, serial I/O, timer,
and interrupt control registers are allocated to addresses from 016 to
7F16.
(2) The processor mode is different.
(3) The reset circuit is different.
(4) Pulse output port mode of timer A is available.
(5) The function of ROM area modification is not available.
A 256-byte direct page area can be allocated anywhere in bank 016
by using the direct page register (DPR). In the direct page addressing
mode, the memory in the direct page area can be accessed with two
words. Hence program steps can be reduced.
MEMORY
The memory map is shown in Figure 1. The address space has a
capacity of 16 Mbytes and is allocated to addresses from 016 to
FFFFFF16. The address space is divided by 64-Kbyte unit called bank.
The banks are numbered from 016 to FF16.
Built-in RAM and control registers for internal peripheral devices are
assigned to bank 016.
Addresses FFD616 to FFFF16 are the RESET and interrupt vector
addresses and contain the interrupt vectors. Use ROM for memory
of this address.
00000016
00007F16
00008016
00000016
00000016
Internal peripheral
devices
Bank 016
Bank 116
control registers
refer to Fig. 2 for
detail information
00FFFF16
01000016
Internal RAM
00007F16
2048 bytes
Interrupt vector table
00FFD616
A-D/UART2 trans./rece.
00087F16
UART1 transmission
UART1 receive
01FFFF16
UART0 transmission
UART0 receive
Timer B2
Timer B1
Timer B0
Timer A4
Timer A3
Timer A2
FE000016
Timer A1
Timer A0
Bank FE16
Bank FF16
INT /Key input
2
INT1
INT0
FEFFFF16
FF000016
Watchdog timer
DBC
BRK instruction
00FFD616
00FFFF16
Zero divide
RESET
00FFFE16
FFFFFF16
: Internal
: External
Fig. 1 Memory map
5
RENESAS [ RENESAS TECHNOLOGY CORP ]
