Furuno FM-8800D - Page 151

5.4 Block Description
5-19
MEMORY CONTENTS
Memory configurations are as follow.
Fig. 5.4.14 Memory Configurations
Table 5.4.5 Memories
Memory Function
FROM U30: CPU (H8S) BUILT-IN
Program storage domain
- Boot loader program
- CPU program
- DSP program (forwarded from CPU to DSP)
- Letter indication font
- CH frequency table
- SQ curb table
SRAM U30: CPU (H8S) BUILT-IN
Storage domain of data at the time of carrying out a
program
DRAM U31: 1M x 16 bits
Storage domain of data at the time of carrying out a
program
- TX/RX message data, etc
- Data buffer of print output
- Stack (CPU work area)
EEPROM U29: 256 kbits
Storage domain of system parameter
- System setup value
- The state of radio equipments
- Log
- Message file
DM
U20:
DSP BUILT-IN CODE RAM
Storage domain of program code
- Program code
- Filter co-efficient of modulation and
demodulation
RAM
U20:
DSP BUILT-IN DATA RAM
Storage domain of data at the time of carrying out a
program
- Data
- Buffer
- Gain table of AL Vol and SQ Vol
U29
EEPROM
U31
DRAM
U30
CPU(H8S)
U20
DSP
FROM
SRAM
RAM
(Program)
DM
(Data)