GMSK Modem Data Pump
Page 34 of 37
MX909A PRELIMINARY INFORMATION
6.1.4 Timing
For the following conditions unless otherwise specified:
Xtal Frequency = 4.096MHz, V = 5.0V @ T = 25°C
DD
AMB
Notes Min.
Typ. Max.
Units
µC Parallel Interface Timings ref (Figure 20)
t
0
ns
ACSL
Address valid to CS low time
Address hold time
t
t
0
0
ns
ns
AH
CSH
CS hold time
CS high time
t
1
6
0
clock cycles
ns
CSHI
t
CSRWL
CS to WR or RD low time
Read data hold time
t
t
t
t
0
0
ns
ns
ns
ns
DHR
Write data hold time
DHW
DSW
Write data setup time
90
0
RHCSL
RD high to CS low time (write)
Read access time from CS low
Read access time from RD low
RD low time
t
t
t
t
t
t
2
2
175
145
ns
ns
ns
ns
ns
ns
RACL
RARL
RL
200
50
RX
RD high to D0-D7 3-state time
WR high to CS low time (read)
WR low time
0
WHCSL
WL
200
6.1.4.1 Timing Notes:
1. Xtal/Clock cycles at the XTAL/CLOCK pin.
2. With 30pF max to V on D0 - D7 pins.
SS
¤2001 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480134.005
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