M306H7MG-XXXFP Datasheet, PDF (249/329 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

M306H7MG-XXXFP/MC-XXXFP/FGFP
14. EXPANSION FUNCTION
Continuous error correction
When uses humming 8/4 (address 021A16) at the same time as humming 24/18, can do the continuous error
correction.
Continuous error correction sequence is shown in Figure 14.25.
A
Humming data (1) Humming data (1)
M
L
B
Humming data (2) Humming data (1)
L
H
Humming data (2) Humming data (2)
C
H
M
Humming data (3) Humming data (3)
D
M
L
E
Humming data (4) Humming data (3)
L
H
F
Humming data (4) Humming data (4)
H
M
1. Writes data A to address 021C16 and writes data B to address
021E16. (Setting the humming data (1) and L of humming data (2).)
2. Reads addresses 021C16 and 021E16 data (Obtains the decoded
value and error information on the humming data (1)).
3. Writes data C to address 021A16 (Setting H and M of the humming data (2)).
4. Reads addresses 021C16 and 021E16 data (Obtains the decoded value
and error information on the humming data (2)).
5. Writes data D to address 021C16 and writes data E to 021E16 (Setting
the humming data (3) and L of humming data (4).)
6. Reads addresses 021C16 and 021E16 data (Obtains the decoded value
and error information on the humming data (3)).
7. Writes data F to address 021A16 (Setting H and M of the humming data (4)).
8. Reads addresses 021C16 and 021E16 data (Obtains the decoded value
and error information on the humming data (4)).
Figure 14.25 Continuous error correction sequence
Then, because using a part of circuit of humming 8/4 about this operation, cannot use this operation at the
same time.
When using the humming circuit, do the decoded result reading operation at once after the setting data of
humming. And do not access other memories (Including the humming circuit) before reading of the decoded
result.
Rev.2.10 Oct 25, 2006 Page 249 of 326
REJ03B0152-0210