Z90251 ZILOG [Zilog, Inc.], Z90251 Datasheet - Page 64

• Manufacturer Part Number: Z90251
• Description: eZVision 200 Television Controllers with OSD
• Manufacturer: ZILOG [Zilog, Inc.]

Table 38 Master I
Command
10X
000
001
010
011
110
111
Description
Send a Start bit followed by the address byte specified in the I
register, then fetch the acknowledgment bit in I
initialize communication. Nine SCLK cycles are generated.
Send the byte of data specified in the I
acknowledgment bit stored in bit 0. Used in a Write frame. Nine SCLK
cycles are generated.
Send bit 7 of I
(0XXXXXXX), NAK: (1XXXXXXX)), then receive a data byte. Used in a
Read frame when the next data byte is expected. Nine SCLK cycles are
generated. Received data is read in the I
Send bit 7 of I
(0XXXXXXX), NAK: (1XXXXXXX). Used in a Read frame. One SCLK
cycle is generated.
Null operation. Must be used with a Reset bit.
Received one data byte. Used in a Read frame to receive the first data
byte after an address byte is transmitted. Eight SCLK cycles are
generated.
Send Stop bit. One SCLK cycle is generated.
2
C Bus Interface Commands
2
2
C_DATA register as an acknowledgment bit (ACK:
C_DATA register as an acknowledgment bit (ACK:
32 KB Television Controller with OSD
2
C data register, then fetch an
2
C data register.
2
C_DATA (0). Used to
PS001301-0800
2
C data
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