BT8954 Datasheet, PDF (88/98 Pages) Conexant Systems, Inc – VOICE PAIR GAIN FRAMER

5.0 Electrical and Mechanical Specifications
5.1 Electrical Specifications
Bt8954
Voice Pair Gain Framer
Table 5-8. Microcomputer Interface Switching Characteristics
Symbol
Parameter
Minimum
Maximum Units
33 Data Out Enable (Low Z) after Read Strobe* Falling Edge⁽¹⁾
2
—
ns
34 Data Out Valid after Read Strobe* Low⁽¹⁾
—
50
ns
35 Data Out Hold after Read Strobe* Rising Edge⁽¹⁾
2
—
ns
36 Data Out Disable (High Z) after Read Strobe* High⁽¹⁾
—
25
ns
37 IRQ* Hold after Write Strobe* Rising Edge^(2,3)
5
—
ns
38 IRQ* Delay after Write Strobe* High^(2,3)
—
T_QCLK ÷ 32 + 20 ns
39 Internal Register Delay after Write Strobe* High⁽³⁾
—
T_QCLK ÷ 32
—
40 Internal RAM Delay after Write Strobe* High⁽³⁾
—
2 x T_QCLK
—
41 Access Data Register Delay after Write Strobe* High⁽³⁾
—
2 x T_QCLK
—
NOTE(S):
(1) _{Read Strobe* is defined as RD* or CS* in Intel mode, and DS* or CS* when R/W* is high in Motorola mode.}
(2) _{When writing an interrupt mask or status register.}
(3) _{Write Strobe* is defined as WR* or CS* in Intel mode, and DS* or CS* when R/W* is low in Motorola mode.}
Figure 5-4. MCI Write Timing, Intel Mode (MOTEL = 0)
AD[7:0]
Address
21
22
Data (Input)
26
27
Write
Strobe*
23
24
20
30
ALE
5-6
Conexant
N8954DSC