Z8623012SSG Datasheet, PDF (24/61 Pages) Zilog, Inc. – ADVANCED PROGRAM BLOCKING AND NTSC LINE 21 XDS DECODER

COMMANDS
WRITING TO THE Z86230
TABLE 8. RDS1–READ ONE BYTE (RDS1 = 40h–51h)
Bit
CM7 CM6 CM5 CM4 CM3 CM2 CM1 CM0
0
1
0 AD04 AD03 AD02 AD01 AD00
R/W
W WW W
W
W
W
W
5.2.3 RDS2 = 60h–70h
RDS2 is a 1-byte command which is used to initiate a 2-byte READ sequence by
moving the contents of the two consecutive registers, starting with the one identi-
fied by the address portion of the command (AD00:AD04), to the first 2 locations
of read bank 0. Only Addresses 00h–10h are valid in the RDS2 command field
AD00:04.
NOTE: For XDS data recovery, when the XDS Filter Register (see Control Registers) is
enabled for the required packets, the Z86230 automatically establishes the 2-byte recovery
mode and moves the recovered data bytes to the first 2 locations of bank 0.
TABLE 9. RSD2–READ TWO BYTES (RDS2 = 60h–70h)
Bit
CM7 CM6 CM5 CM4 CM3 CM2 CM1 CM0
0
1
1 AD04 AD03 AD02 AD01 AD00
R/W
W WW W
W
W
W
W
5.3 WRITING TO THE Z86230
5.3.1 WRxx = C0h–D1h
TABLE 10. WRXX–WRITE REGISTER XX (WRX = C0h–D1h)
Bit
CM7 CM6 CM5 CM4 CM3 CM2
1
1
0 AD04 AD3 AD2
R/W
W WW W
W
W
CM1
AD1
W
CM0
AD0
W
The WRITE commands require 2 bytes to execute. The first byte is the write com-
mand and includes the Z86230 register address (AD00:04) being written. The sec-
ond byte is the data to be written.
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Z86230—PRELIMINARY
PS000401-TVC0699