Z90251 Datasheet, PDF (93/97 Pages) Zilog, Inc. – eZVision 200 Television Controllers with OSD

Z90255 ROM and Z90251 OTP
32 KB Television Controller with OSD
85
11.3 AC Characteristics
The numbers in Table 74 correspond to the numbered signal segments in
Figure 22.
Table 74 AC Characteristics
No. Symbol
Parameter
Min Max Unit
1 TpC
Input Clock Period
166 1000 ns
2 T_RC, T_FC
Clock Input Rise And Fall Time
25
ns
3 T_WC
Input Clock Width
35
ns
4 T_WHsync_INL
Hsync Input Low Width
70
ns
5 T_WHsync_INH
Hsync Input High Width
3TpC
6 TpHsync_IN
Hsync Input Period
8TpC
7 T_RHsync_IN, T_FHsync_IN Hsync Input Rise Fall Time
100 ns
8 T_WIL
Interrupt Request Input Low
70
ns
9 T_WIH
Interrupt Request Input High 3TpC
10 T_DPOR
Power-On Reset Delay
25
100 ms
11 T_DLVIRES
Low Voltage Detect To Internal 200
ns
Reset Condition
12 T_WRES
13 T_DH_SOl
14 T_DH_SOH
Reset Minimum Width
H_sync Start To OSDX2 Stop
H_sync Start To OSDX2 Start
5TpC
2TpV
3TpV
1TpV
PS001301-0800