STPC12GDYC datasheet(54/111 Pages) STMICROELECTRONICS

54 / 111 page

ELECTRICAL SPECIFICATIONS

54/111

Issue 1.0 - July 24, 2002

4.5.6 ISA INTERFACE AC TIMING CHARACTERISTICS

Table 4-8 and Table 4-14 list the AC characteris-

tics of the ISA interface.

Figure 4-8 ISA Cycle (ref Table 4-14)

Note 1: Stands for SMEMR#, SMEMW#, MEMR#, MEMW#, IOR# & IOW#.

The clock has not been represented as it is dependent on the ISA Slave mode.

Valid AENx

Valid Address

Valid Address, SBHE*

V.Data

VALID DATA

ALE

AEN

LA [23:17]

SA [19:0]

CONTROL (Note 1)

IOCS16#

MCS16#

IOCHRDY

READ DATA

WRITE DATA

Table 4-14. ISA Bus AC Timing

Name

Parameter

Min

Max

Units

LA[23:17] valid before ALE# negated

Cycles

LA[23:17] valid before MEMR#, MEMW# asserted

3a Memory access to 16-bit ISA Slave

Cycles

3b Memory access to 8-bit ISA Slave

Cycles

SA[19:0] & SBHE valid before ALE# negated

Cycles

SA[19:0] & SBHE valid before MEMR#, MEMW# asserted

10a Memory access to 16-bit ISA Slave

Cycles

10b Memory access to 8-bit ISA Slave

Cycles

SA[19:0] & SHBE valid before SMEMR#, SMEMW# asserted

10c Memory access to 16-bit ISA Slave

Cycle

Note: The signal numbering refers to Table 4-8

STPC12GDYC 数据表(PDF) 54 Page - STMicroelectronics

STPC12GDYC 数据表(HTML) 54 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载

链接网址

STPC12GDYC 数据表(PDF) 54 Page - STMicroelectronics

STPC12GDYC 数据表(HTML) 54 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表 下载

链接网址

数据表下载