Zilog Z80180 - Manual (Page 183)

Z8018x
Family MPU User Manual
168
UM005003-0703
Figure 69. E Clock Timing in SLEEP Mode and SYSTEM STOP Mode
On-Chip Clock Generator
The Z8X180 contains a crystal oscillator and system clock generator. A
crystal can be directly connected or an external clock input can be
provided. In either case, the system clock is equal to one-half the input
clock. For example, a crystal or external clock input of 8 MHz
corresponds with a system clock rate of 4 MHz.
Z8S180 and Z8L180-class processors also have the ability to run at X1
and X2 input clock.
Table 25 describes the AT cut crystal characteristics (Co, Rs) and the load
capacitance (CL1, CL2) required for various frequencies of Z8X180
operation.
E
E
E
T1 T2 T3 Ts T1 T1 T2 T2 Ts Ts Ts
76H
SLP
Instruction
2nd Op Code
Fetch Cycle SLEEP mode or SYSTEM STOP mode
Op Code
Fetch Cycle
E
Phi
D0 – D7
INT, NMI