參數(shù)資料
型號(hào): SC28C94
廠商: NXP Semiconductors N.V.
英文描述: Quad universal asynchronous receiver/transmitter QUART
中文描述: 四通用異步接收器/發(fā)送器夸脫
文件頁(yè)數(shù): 27/38頁(yè)
文件大?。?/td> 230K
代理商: SC28C94
Philips Semiconductors
Product specification
SC28C94
Quad universal asynchronous receiver/transmitter (QUART)
1998 Aug 19
27
AC ELECTRICAL CHARACTERISTICS
V
CC
= 5V
±
10%, T
A
= –40 C to 85 C, unless otherwise specified.
NO.
FIGURE
CHARACTERISTIC
LIMITS
Typ
UNIT
Min
Max
65
30 + 3
X1 edges
1
15
15
1
7
D[7:0] Valid after IACKN Low
ns
2
7
DACKN Low after IACKN Low
0 + 2
X1 edges
1
0
0
30
ns
3
4
5
7
7
7
D[7:0] floating after IACKN High
DACKN High after IACKN High
IACKN High after IACKN Low
ns
ns
ns
NOTE:
1. Consecutive write operations to the upper four bits of the Command Register (CR) require at least three X1/CLK edges; four X1/CLK edges
in the ‘X1/CLK divide by 2 edges’ according to register 2E or 2F setting.
IRQN
IACKN
D[7:0]
DACKN
1
5
2
3
4
SD00165
NOTE: Rise time of IRQN is dependent on external circuit.
Figure 7. Interrupt Knowledge (IACKN) Timing
OSC/N
EVAL/HOLD
IACKN
CIR
VALUE FOR THIS INTERRUPT
SD00166
Figure 8. Interrupt Bid Arbitration Timing
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