Hayes Microcomputer Products RCV56HCF - Manual (Page 47)

RCV56HCF PCI/CardBus Modem Designer’s Guide
1129 ROCKWELL PROPRIETARY INFORMATION 3-25
3.3.4 IOM-2 Interface
The interface timing is listed in Table 3-13 and shown in Figure 3-8.
Table 3-13. Timing - IOM-2 Interface
Symbol Parameter Min Typ. Max Units Test Condition
tr, tf Data clock (DCL) and frame
sync (FSC) rise/fall – – 30 ns CL = 25 pF
tDCL Data clock period (note 1) 565 651 735 ns CL = 25 pF
twH, twL Data clock pulse width high/low
(note 1) 200 310 420 ns
tsD Data setup 32 – – ns
thD Data hold 32 – – ns
tdF Frame advance 0 65 130 ns CL = 25 pF
thF Frame hold 20 – – ns CL = 25 pF
tdDC Data delay clock – 20 100 ns CL = 150 pF
tdDF Data delay frame – – 150 ns CL = 150 pF
Notes:
1. 768 bps.
Bit N Bit 0
Bit 0
Detail a
Detail a
t wH
t sD
t dDF
t dDC
t dF
t hD
t wL
t DCL
t r t f
Bit 1 Bit 2
IOM_DU (DU)
IOM_DD (DD)
IOM_FRAME (FSC)
IOM_CLK (DCL)
IOM_DD (DD)
IOM_DU (DU)
IOM_FRAME (FSC)
IOM_CLK (DCL)
1123F3-9
t hF
Figure 3-8. Waveforms - IOM-2 Interface