PT7A6632J PERICOM [Pericom Semiconductor Corporation], PT7A6632J Datasheet - Page 33

• Manufacturer Part Number: PT7A6632J
• Description: PT7A6632 32-Channel HDLC Controller
• Manufacturer: PERICOM [Pericom Semiconductor Corporation]

PT019(05/02)
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Receive Command Buffer
The Receive Command Buffer contains 8 bytes of descriptors and 2 bytes of Channel Mode & Rate Definition Data (and maybe
Hyperchannel Configuring Bytes) as shown in Figure 27. The MDFS pin decides the MS byte and LS byte locations (in even
and odd addresses).
Figure 27. Receive Command Buffer
(Address)
(i+7)+1
(i+7)+2
(i+7)+3
(i+7)+j
i+1
i+2
i+3
i+4
i+5
i+6
i+7
i
~ ~
msb
msb
7
x
0
E
E
IVBA
A
A
0
a. MDFS = 1
0
x
x
(Contents)
Not Used
Not used
Not used
Not used
Not used
0
INV LOOP SIG HDLC
Channel Number
Channel Number
CMND
(1)
MPTY
lsb
lsb
0
~ ~
Mode
FILL/MASK
Status
Data Length (j)
Next Buffer
Address
33
PT7A6632 32-Channel HDLC Controller
(Address)
(i+7)+1
(i+7)+2
(i+7)+3
(i+7)+j
i+1
i+2
i+3
i+4
i+5
i+6
i+7
i
~ ~
msb
msb
7
x
0
E
E
IVBA
A
A
0
b. MDFS = 0
0
x
x
(Contents)
Not used
Not used
Not used
Not used
Not used
0
INV LOOP SIG HDLC
Channel Number
Channel Number
CMND
(1)
MPTY
lsb
lsb
0
Data Sheet
~ ~
Data Length (j)
Mode
Status
FILL/MASK
Next Buffer
Address
Ver:2