Z90251 ZILOG [Zilog, Inc.], Z90251 Datasheet - Page 62

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

Table 35 Master I
If bits 4 and 5 both equal 1, then the I
Controlling the I
Software controls the I
Command Register (I
Bit
R/W
Reset
Note: R = Read W = Write X = Indeterminate
Bit/
Field
Clock Selection
Reserved
I
I
Reserved
I
I
2
2
2
2
C Selection 1
C Selection 0
C Enable
C Speed (for 6-MHz XTAL) 1, 0
7
2
R/W
C Control Register 0Ch: Bank C (I
2
x
C Interface
2
2
C_CMD:0Bh:0Ch). See Table 36.
C module by writing appropriate commands into the I
6
R/W
x
Bit
Position
7
6
5
4
3
2
5
R/W
0
2
R/W
R/W
R/W
R/W
R/W
R/W
R/W
C Selection 0 prevails.
4
W
R
32 KB Television Controller with OSD
R/W
0
Value Description
00
01
10
11
0
1
0
1
0
1
0
1
3
R/W
2
x
C_CNTL)
1X SCLK for I
0.5X SCLK for I
Return
No Effect
P26 selection - POR
P27 selection - POR
SCLK1 selection on P26
SDATA1 selection on P27
P24 selection - POR
P25 selection - POR
SCLK 0 selection on P24
SDATA0 selection on P25
Must be 0
Disable I
Enable I
10 KHz
50 KHz
100 KHz
330 KHz
2
R/W
1
2
x
2
C Interface
C Interface
2
1
C and ADC
2
R/W
C and ADC
PS001301-0800
x
0
R/W
2
x
C
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