參數(shù)資料
型號: 03H5716
元件分類: 通信及網(wǎng)絡(luò)
英文描述: SPECIALTY TELECOM CIRCUIT, PQFP100
封裝: 14 X 20 MM, 2.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, FP-100
文件頁數(shù): 31/70頁
文件大小: 547K
代理商: 03H5716
Product Part Number: IBM22-ALDC1020S-01
ALDC1-20S-HA
I B M Microelectronics Division
Document Number: DCAL2HDSU-02
Data Compression
Figure
4-12 (Part 3 of 3). Four-edge Controller Timing. When using this figure, replace "x" by "O" only or
"C" only, as appropriate. Negative active timings are shown. Positive active
timing values are given in brackets { } when different from the negative active
timing values.
REF
DESCRIPTION
MIN
MAX
T1
xREQ active to xREQ inactive
2 clock cycles
T2
xREQ inactive to xACK inactive
1 clock cycle
2 clock cycles +
22 ns
{2 clock cycles +
26 ns}
T3
xACK inactive to next xREQ active
0ns
T4
xREQ active to xACK active
1 clock cycle
T5
xACK active to xACK inactive
2 clock cycles
5
ns
T6
+xDATA valid after xACK active
1 clock cycle
5
ns
1 clock cycle + 5
ns
{1 clock cycle + 9
ns}
T7
+xDATA valid after xACK inactive
1 clock cycle
5
ns
{1 clock cycle
7
ns}
1 clock cycle + 8
ns
{1 clock cycle + 4
ns}
T8
+xDATA valid before xACK inactive
12 ns
{16 ns}
T9
+xDATA hold time after xACK inactive
0ns
4.3.2 Burst Mode
This mode is like the four-edge mode. It is
asynchronous and requires both a request and
acknowledge signal. The key difference is that
there may be multiple acknowledges and there-
fore multiple data transfers during a single
extended request, thereby reducing the number
of cycles required per transfer.
(C) IBM CORP. 1993, 1994. ALL RIGHTS RESERVED. USE IS FURTHER SUBJECT TO THE PROVISIONS ON THE BACK OF THE TITLE PAGE.
4-13
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