ez80l92 ZiLOG Semiconductor, ez80l92 Datasheet - Page 60

• Manufacturer Part Number: ez80l92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 15. Z80
PS013014-0107
STATE T1
STATE T2
STATE T3
The Write cycle begins in State T1. The CPU drives the address onto the address bus, the
associated Chip Select signal is asserted.
During State T2, the WR signal is asserted. Depending upon the instruction, either the
MREQ or IORQ signal is asserted. If the external WAIT pin is driven Low at least one eZ80
system clock cycle prior to the end of State T2, additional WAIT states (T
until the WAIT pin is driven High.
During State T3, no bus signals are altered.
®
During Write operations, Z80 Bus Mode employs 3 states (T1, T2, and T3) as described in
Table
Z80 Bus Mode Read and Write timing is illustrated in
Mode states can be configured for 1 to 15 eZ80 system clock cycles. In these figures, each
Z80 Bus Mode state is two eZ80 system clock cycles in duration.
also illustrate the assertion of 1 WAIT state (T
Z80 Bus Mode cycle.
Bus Mode Write States
15.
WAIT
) by the external peripheral during each
Figure 7
and
Chip Selects and Wait States
Product Specification
Figure 7
Figure
WAIT
eZ80L92 MCU
8. The Z80 Bus
and
) are asserted
Figure 8
54