W90210F Winbond Electronics Corp America, W90210F Datasheet - Page 38

• Manufacturer Part Number: W90210F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

Bit[6]- Full (Read only)
Bit[7]- empty (Read only)
5. CONFIGA register (offset 244) (R/W only in configuration mode)
Bit [0]- Indicates if interrupts are pulsed or level (Read only)
Bit [1:3 ]- Pword size (R/W)
Bit [4]- reserved
Bit [5]- nByteInTransceiver (Read only)
Bit [6:7]- Snapshot of the Pword
6. Reverse address register (offset 245) (Read only)
Bit [0:1]- Reserved
Bit [2]- Tag_all
Bit [3:6]- Tag0, Tag1, Tag2, Tag3
Bit [7]- Tag
0
0
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0: When transmiting (at host recovery), there is one byte in the transceiver waiting to be transmitted
that does not affect the FIFO full bit.
This field is not used for Pword size of 1 byte.
For host recovery situations these bits indicate what fraction of a Pword was not transmitted so that
software can re-transmit the unsent bytes. If the Pword size is 4 bytes the value of these two bits is a
snapshot of the last Pword being transmitted in mode 011 event 35 when the FIFO was reset (port
was transitioned from mode 011 to mode 000 or 001)
1: direction = 0 The FIFO cannot accept another Pword.
1: direction = 1 The FIFO is completely full.
0: direction = 0 The FIFO has at least 1 free Pword
0: direction = 1 The FIFO has at least 1 free byte.
1: direction = 0 The FIFO is completely empty
1: direction = 1 The FIFO contains less than 1 Pword of data
0: direction = 0 The FIFO contains at least 1 byte of data
0: direction = 0 The FIFO contains at least 1 Pword of data
0: pulse
1: level
001: Pword size = 1 byte
010: Pword size = 4 byte
000 and 011 ~ 111: reserved
00- the Pword at the head of the FIFO contained a complete Pword
01- the Pword at the head of the FIFO contained only 1 valid bytes.
10- the Pword at the head of the FIFO containeed 2 valid bytes.
11- the Pword at the head of the FIFO contained 3 valid bytes.
1: To indicate the unread bytes of the FIFO storing the reverse data/ command that has at least
one address bytes.
0: There is no address byte in the FIFO
to check if there is one byte of the following read Pword = 4 bytes is the reverse address. Tag0,
Tag1, Tag2 and Tag3 are individually for the byte0, byte1, byte2 and byte3 of the Pword
to check if the byte of the following read Pword (1 byte) is the reverse address.
This bit shall be set to 1 whenever there are readIntrThreshold or more valid Pwords to be read
from FIFO.
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W90210F
Version 1.4, 10/8/97