am85c30 Advanced Micro Devices, am85c30 Datasheet - Page 67

• Manufacturer Part Number: am85c30
• Description: Enhanced Serial Communications Controller
• Manufacturer: Advanced Micro Devices

14
Notes:
1 Parameter applies only between transactions involving the ESCC, if WR/RD falling edge is synchronized to PCLK
2. Open-drain output, measured with open-drain test load.
3. Parameter is system dependent. For any SCC in the daisy chain, TdIAi(RD) must be greater than the sum of DdPC(IEO)
4. Parameter applies to Enhanced Request mode only.
SWITCHING CHARACTERISTICS over MILITARY/INDUSTRIAL operating range
(continued)
Interrupt Acknowledge Timing, Reset Timing, Cycle Timing (see Figures 22–24)
35a
35b
No.
27
28
29
30
31
32
33
34
36
37
38
39
40
41
42
43
44
45
46
47
48
49
falling edge, then TrC = 3TcPc.
for the highest priority device in the daisy chain, TsIEI(RDA) for the SCC, and TdIEI(IEO) for each device separating
them in the daisy chain.
AMD
TdA(DR)
TwWRI
TdWRf(DW)
ThDW(WR)
TdWR(W)
TdRD(W)
TdWRf(REQ)
TdRDf(REQ)
TdWRr(REQ)
TdWRr(EREQ)
TdRDr(REQ)
TdPC(INT)
TdIAi(RD)
TwRDA
TdRDA(DR)
TsIEI(RDA)
ThIEI(RDA)
TdIEI(IEO)
TdPC(IEO)
TdRDA(INT)
TdRD(WRQ)
TdWRQ(RD)
TwRES
Trc
Parameter
Symbol
Address Required Valid to Read
Data Valid Delay
WR Low Width
WR
Write Data to WR
WR
RD
WR
RD
WR
WR
RD
PCLK
INTACK to RD
Delay (Note 3)
RD (Acknowledge) Width
RD
Data Valid Delay
IEI to RD
Time
IEI to RD
Time
IEI to IEO Delay Time
PCLK
RD
RD
WR
WR and RD Coincident Low for
Reset
Valid Access Recovery Time
(Note 1)
to Wait Valid Delay (Note 2)
to W/REQ Not Valid Delay
to DTR/REQ Not Valid Delay
(Acknowledge) to Read
to INT Inactive Delay (Note 2)
to WR
to Write Data Valid
to Wait Valid Delay (Note 2)
to W/REQ Not Valid Delay
to DTR/REQ Not Valid Delay
to DTR/REQ Not Valid Delay
to RD
to INT Valid Delay (Note 2)
to IEO Delay
Description
Parameter
(Acknowledge) Setup
(Acknowledge) Hold
Delay for No Reset
Delay for No Reset
(Acknowledge)
Hold Time
A M E N D M E N T
Am85C30
150
Min
150
150
150
8.192 MHz
3.5
95
15
15
0
0
4TcPc
Max
220
170
170
170
170
120
500
140
200
450
NA
35
95
Min
125
125
125
100
3.5
80
15
15
0
0
10 MHz
4TcPc
Max
160
100
100
120
120
120
400
120
175
320
NA
35
80
16.384 MHz
Min
3.5
75
50
75
50
10
10
75
0
0
4TcPc
Max
100
175
200
NA
20
50
50
70
70
70
70
45
80
Industrial Only
Min
3.5
65
45
65
45
10
10
65
20 MHz
0
0
4TcPc ns
Max
160
180
NA
20
50
50
65
65
65
40
70
90
60
TcPc
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns