W6694 Datasheet, PDF (18/33 Pages) Winbond – USB Bus ISDN S/T-Controller

Preliminary W6694
EEPROM Contents :
Offse
t
0
2
4
Size
(Byte)
2
2
2
Contents
15
0
Vendor ID
Device ID
Device release number
8. REGISTER DESCRIPTIONS
8.1 Interrupt Registers
These registers will be read by Interrupt-IN packet only, so the USB host will periodically receive
these data. These registers can not be read by Bulk-IN transfer.
8.1.1 Interrupt Status Register
ISTA
Read_clear
This register indicates interrupt occurred in various interrupt sources. This register is cleared
automatically after it is read and successfully ACKed by the USB host.
Values after reset: 00h
7
6
5
4
3
2
1
0
ICC MOC PIOIC
0
0
0
0
0
ICC Layer 1 Indication Code Change
A change of value in the received indication code has been detected. The new code is in
Layer 1 Command/Indication Register (CIR) register.
MOC Monitor Channel Status Change
A change of value in the GCI mode Monitor Channel Interrupt Register (MOIR) has occurred.
PIOIC Programmable IO Port Input Signal Changed
A change of value in at least one input IO pin is detected. The input IO pins that change value
can be identified in PIO Input Change Register (PICR) register.
8.1.2 Layer 1 Command/Indication Register CIR Read
Value after reset: 0Fh
7
6
5
0
0
0
4
3
2
1
0
0
CIR3 CIR2 CIR1 CIR0
CIR3-0 Layer 1 Indication Code
Value of the received layer 1 indication code for S/T interface. Note these bits have a buffer
size of two.
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