z02201 ZiLOG Semiconductor, z02201 Datasheet - Page 69

• Manufacturer Part Number: z02201
• Description: Z02201 V.22bis Data Pump With Integrated Afe
• Manufacturer: ZiLOG Semiconductor

Data Pump Firmware Version Number and Part Number
PS000904-0107
Receiving
3. When the data pump begins sending the frame's closing flag, it sets Reg7, bit
1. Prepare to receive a new frame.
2. When Reg5, bit
•
•
•
3. Continue from step 1 to receive the next frame. If RXERROR is 1, discard any
4. If DATAP was 0FF, an HDLC abort sequence was received. If DATAP was
The data pump code version can be obtained any time the RAM location CONFIG
register, bits 0–6 (MODE) is set to
pump RAM location 0 and the code version number to the DATAP register. To
obtain the version and part number from the data pump, the following steps must
be performed:
1. Set CONFIG register, bits 0–6 (MODE) to
until at least 8 bit times after it has set Reg4, bit
pump is ready to transmit another data byte. To transmit another frame, repeat
steps 1–2.
2
pump sets Reg7, bit
register Reg7, followed by DATAP. Register 7 (Reg7) is read first, because the
data pump may change it any time after DATAP is read. If Reg4,
the data pump generates an interrupt when it sets Reg5, bit
Act on the value of Reg7 read in step 2 as follows:
If RXERROR is
frame byte. Repeat step 2 to receive all remaining frame bytes.
If RXERROR is
been received.
If Byte1–ByteN+3 have been read, with ByteN+3 being the DATAP value just
read, then the two previous bytes (ByteN+1 and ByteN+2), are the frame
checksum bytes; the remaining bytes (Byte1–ByteN) are the frame data bytes.
received frame bytes and continue from step 1 to receive the next frame.
07Eh
Config to provide the data pump enough time to begin standby operation.
(TEND) to
, an HDLC frame with an incorrect checksum was received.
0
. Transmission of the frame is complete 8 bit times after the data
0
0
6
and EOF is
and EOF is
(RXI) is
7
(TEND) to
1
, the data pump has received a byte. First read
0
1
, the DATAP value read in step 2 is an HDLC
, an HDLC frame with a correct checksum has
0
. The data pump writes the part number to data
0
.
V.22BIS Data Pump with Integrated AFE
0
(STANDBY), then read location
7
(TXI) to
1
, indicating the data
6
(RXI)
6
(RXIE) is
1
.
1
,
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