Z8023016VSC Zilog, Z8023016VSC Datasheet - Page 78

• Manufacturer Part Number: Z8023016VSC
• Description: IC 16MHZ Z8000 CMOS ESCC 44-PLCC
• Manufacturer: Zilog
• Series: IUSC™r

Specifications of Z8023016VSC

• Controller Type: Serial Communications Controller (SCC)
• Interface: Bus
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 7mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PS005308-0609
Z85230/L Read Cycle Timing
Z85230/L Write Cycle Timing
A/B, D/C
from the falling edge of WR or RD in the first transaction involving the ESCC, to the fall-
ing edge of WR or RD in the second transaction. This time must be at least four PCLKs
regardless of which register or channel is accessed.
Figure 20
INTACK must remain stable throughout the cycle. The effective RD time reduces if CE
falls after RD falls, or if it rises before RD rises.
Figure 21
tus on INTACK must remain stable throughout the cycle. The effective WR time reduces
if CE falls after WR falls, or if it rises before WR rises. In Write Cycle timing, the WR sig-
nal returns a High slightly before the Address goes invalid.
Because many popular CPUs do not guarantee that the databus is valid when WR is Low,
the ESCC no longer requires a valid databus when the WR pin is Low. For more informa-
tion, see AC characteristics parameter 29 available in
INTACK
D7–D0
RD
CE
displays Read Cycle timing. Addresses on A/B and D/C and the status on
on page 74 displays Write Cycle timing. Addresses on A/B and D/C and the sta-
Figure 20. Read Cycle Timing (Z85230/L)
Address Valid
Data Valid
Table 47
on page 90.
Product Specification
Z80230 Interface Timing
Z80230/Z85230/L
73