Data Sheet
4-Level FSK Modem Data Pump Page 44 of 47 MX919B PRELIMINARY INFORMATION
©2001 MX•COM, INC. www.mxcom.com Tele: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480170.003
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DATA
D0 to D7 (1 byte)
READ CYCLE (DATA FROM MODEM)
ADDRESS VALID
DATA
D0 to D7 (1 byte)
t
RL
t
DHR
t
RX
DATA VALID
DATA
VALID
WRITE CYCLE (DATA TO MODEM)
t
CSRWL
t
RHCSL
t
DSW
t
DHW
t
WHCSL
t
RARL
t
RACL
ADDRESS
A0 A1
,
t
AH
t
ACSL
t
CSRWL
t
WL
t
CSHI
t
CSH
t
AH
t
ACSL
t
CSHI
t
CSH
ADDRESS VALID
CS
WR
RD
ADDRESS
A0 A1
,
CS
WR
RD
Figure 28: µ
µµ
µC Parallel Interface Timings