AMD Am186TMER, Am188TMER user manual A19-A0 Address AD7-AD0

Figure 3-3 Am188ER Microcontroller Address Bus—Normal Read and Write Operation

			t1	t2				t3			t4
	Address						Data
CLKOUTA		Phase					Phase
A19–A0					Address
AD7–AD0
			Address							Data
(Read)
AO15–AO8						Address
(Read or Write)
AD7–AD0
			Address						Data
(Write)

LCS or UCS

MCSx, PCSx

Figure 3-4 Am188ER Microcontroller—Read and Write with Address Bus Disable In Effect

		t1	t2			t3		t4
	Address				Data
CLKOUTA	Phase				Phase
A19–A0				Address
AD7–AD0
(Read)							Data
AO15–AO8
					Address
AD7–AD0
						Data
(Write)

LCS, UCS

3-20 System Overview