psf2115 ETC-unknow, psf2115 Datasheet - Page 179

• Manufacturer Part Number: psf2115
• Description: Isdn Adapter Circuit Ipac
• Manufacturer: ETC-unknow

Semiconductor Group
The following figure gives an example of a DMA driven transmission sequence with a
supposed frame length of 140 bytes, i.e. programmed transmit byte count (XCNT) equal
139 bytes.
Figure 84
Serial
Interface
IPAC
CPU/DMA
Interface
XCNT = 139
DMA Driven Transmission Sequence Example
WR;
XTF
DRQT (64)
WR
179
DRQT (64)
WR
64
Transmit Frame
DRQT (12)
WR
(140 Bytes)
Operational Description
64
12
XPR
PSB 2115
PSF 2115
ITD09651
11.97