W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 47

• Manufacturer Part Number: W90220F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Winbond.
47
Bits 0-20 Reserved
Bits 21-31 Number of PCICLK count for Master Latency Adjustment
5.2.4
There are eleven registers included in the Parallel Port Interface (PPI) controller. The IO address map is allocated
from 0xf0000370 to 0xf000037f.
Table 5.2.4-1 : PPI Register Map
BA + 0x377
BA + 0x378
BA + 0x379
BA + 0x37d
BA + 0x370
BA + 0x374
BA + 0x375
BA + 0x376 ~
BA + 0x37a
BA + 0x37b
BA + 0x37c
BA + 0x37e
Port Addr.
BA+ 0x37f
24
PARALLEL PORT INTERFACE REGISTERS
Latency Time = REQ3_reg[0:11] / PCICLK
25
Symbol
CMD
DCR
Dfifo
DSR
TOR
FCR
FSR
IER
DL
IIR
DR
-
26
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
REQ3_reg[3:10]
R
R
R
R
27
-
Description
Data Line Register
Device Status Register
Device Control Register
FIFO Status Register
FIFO Control Register
Interrupt Enable Register
Interrupt Identification Register
Data Register
Data FIFO
Command Register
Time Out Register
Reserve for PPI future extension
28
29
(IO base (BA) : 0xf0000000)
30
31
W90220F
Version 0.84