M37221M4H_15 Datasheet, PDF (15/114 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
8.2 MEMORY
8.2.1 Special Function Register (SFR) Area
The special function register (SFR) area in the zero page includes
control registers such as I/O ports and timers.
8.2.2 RAM
RAM is used for data storage and for stack area of subroutine calls
and interrupts.
8.2.3 ROM
ROM is used for storing user programs as well as the interrupt vector
area.
8.2.4 OSD RAM
RAM used for specifying the character codes and colors for display.
8.2.5 OSD ROM
ROM used for storing character data for display.
8.2.6 Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
8.2.7 Zero Page
The zero page addressing mode can be used to specify memory and
register addresses in the zero page area. Access to this area is pos-
sible with only 2 bytes in the zero page addressing mode.
8.2.8 Special Page
The special page addressing mode can be used to specify memory
addresses in the special page area. Access to this area is possible
with only 2 bytes in the special page addressing mode.
8.2.9 ROM Correction Memory (RAM)
This is used as the program area for ROM correction.
■ M37221M4 H/M6H -XXXSP/FP
000016
M37221M6H-
XXXSP/FP
RAM
(448 bytes)
M37221M4H-
XXXSP/FP
RAM
(384 bytes)
00C016
00FF16
017F16
01BF16
02C016
02E016
02FF16
OSD RAM
(96 bytes)
(See note)
060016
06B716
M37221M6H-
XXXSP/FP
ROM
(24K bytes)
A00016
C00016
SFR area
Not used
Not used
Not used
Zero page
OSD ROM
(8K bytes)
1000016
11FFF16
ROM correction function
Vector 1: address 02C016
Vector 2: address 02E016
Not used
M37221M4H-
XXXSP/FP
ROM
(16K bytes)
FF0016
FFDE16
FFFF16
Interrupt vector area
Special page
1FFFF16
Note: Refer to Table 8.11.4 OSD RAM.
Fig. 8.2.1 Memory Map (M37221M4H/M6H-XXXSP/FP)
Rev.1.00 Oct 01, 2002 page 13 of 110
REJ03B0134-0100Z