M306H7MG-XXXFP Datasheet, PDF (248/329 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

M306H7MG-XXXFP/MC-XXXFP/FGFP
14. EXPANSION FUNCTION
14.8 24/18 Humming Decoder
24/18 humming decoder operates only by written the data which is 24/18 humming-encoded to 24/18 humming
register 0 (address 021C16) and 1 (address 021E16). Can obtain the decoded result by reading the same 24/18
humming register, and the decoded value and error information are output.
Decoded result is shown in Figure 14.23 and humming 24/18 register composition is shown in Figure 14.24.
Address
021E16
0000
Humming data H
MSB
Writing
24/18 humming register 1
Reading
Error information
0000
Decode
value
0 MSB
Humming data M
Humming data L
Writing
24/18 humming register 0
Reading
Decode value
LSB
Address
021C16
LSB
“1” output when single error
“1” output when double error
The mistake by one pile is corrected and output.
Figure 14.23 Decoded result
Humming 24/18 register 0
b15
87
0
Symbol
HM0
Address
021C16
When reset
000016
Function
RW
24/18 humming decoder operates by two ways : writing data low-order and middle-order 16
bits to this register and writing data high-order 8 bits to humming 24/18 register 1 (021E16).
Can obtain the decoded result by reading this register and humming 24/18 register 1.
Humming 24/18 register 1
b15
87
0
Symbol
HM1
Address
021E16
When reset
000016
Function
RW
24/18 humming decoder operates by two ways : writing data low-order and middle-order 16
bits to humming 24/18 register 0 (021C16) to this register and writing data high-order 8 bits
to this register.
Can obtain the decoded result by reading this register and humming 24/18 register 0.
Figure 14.24 Humming 24/18 register composition
Rev.2.10 Oct 25, 2006 Page 248 of 326
REJ03B0152-0210