MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 424

• Manufacturer Part Number: MC68000
• Manufacturer: MOTOROLA [Motorola, Inc]

SCC Programming Reference
E-2
NOTE: The offset is from the MC68302 base address + ($400 for SCC1, $500 for SCC2, or $600 for SCC3).
NOTE: The offset is from the MC68302 base address + ($400 for SCC1, $500 for SCC2, or $600 for SCC3).
Initialized
Initialized
by User
by User
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
General Parameter and HDLC Protocol-Specific RAM for SCCx
Offset
Offset
Hex
Hex
0A
0C
0E
1A
1C
1E
2A
2C
2E
3A
3C
3E
8A
8C
8E
9A
9C
9E
A0
00
02
04
06
08
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
80
82
84
86
88
90
92
94
96
98
Table E-1 (b). HDLC Programming Model (Continued)
Receive and Transmit Buffer Descriptors for SCCx
Rx BD 0 Control/Status
Rx BD 0 Data Count
Rx BD 0 Data Pointer (High Word)
Rx BD 0 Data Pointer (Low Word)
Rx BD 1 Control/Status
Rx BD 1 Data Count
Rx BD 1 Data Pointer (High Word)
Rx BD 1 Data Pointer (Low Word)
Rx BD 2 Control/Status
Rx BD 2 Data Count
Rx BD 2 Data Pointer (High Word)
Rx BD 2 Data Pointer (Low Word)
Rx BD 3 Control/Status
Rx BD 3 Data Count
Rx BD 3 Data Pointer (High Word)
Rx BD 3 Data Pointer (Low Word)
Rx BD 4 Control/Status
Rx BD 4 Data Count
Rx BD 4 Data Pointer (High Word)
Rx BD 4 Data Pointer (Low Word)
Rx BD 5 Control/Status
Rx BD 5 Data Count
Rx BD 5 Data Pointer (High Word)
Rx BD 5 Data Pointer (Low Word)
Rx BD 6 Control/Status
Rx BD 6 Data Count
Rx BD 6 Data Pointer (High Word)
Rx BD 6 Data Pointer (Low Word)
Rx BD 7 Control/Status
Rx BD 7 Data Count
Rx BD 7 Data Pointer (High Word)
Rx BD 7 Data Pointer (Low Word)
Rx Internal Data Pointer (High Word)
Tx Internal Data Pointer (High Word)
Rx Internal Data Pointer (Low Word)
TX Internal Data Pointer (Low Word)
Reserved
Reserved
Temp Receive CRC High
Temp Receive CRC Low
RFCR
Table E-1 (a). HDLC Programming Mode
Rx Internal Byte Count
Tx Internal Byte Count
Rx Internal State
Tx Internal State
CRC_Mask_L
Rx Temp
Tx Temp
Name
MRBLR
Name
Rx Internal Buffer
MC68360 USER’S MANUAL
Tx Internal Buffer
TFCR
No.
No.
Initialized by
Initialized
by User
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
User
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Offset
Hex
Offset
4A
4C
4E
5A
5C
5E
6A
6C
6E
7A
7C
7E
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
Hex
AA
AC
AE
BA
BC
BE
A2
A4
A6
A8
B0
B2
B4
B6
B8
Tx BD 0 Control/Status
Tx BD 0 Data Count
Tx BD 0 Data Pointer (High Word)
Tx BD 0 Data Pointer (Low Word)
Tx BD 1 Control/Status
Tx BD 1 Data Count
Tx BD 1 Data Pointer (High Word)
Tx BD 1 Data Pointer (Low Word)
Tx BD 2 Control/Status
Tx BD 2 Data Count
Tx BD 2 Data Pointer (High Word)
Tx BD 2 Data Pointer (Low Word)
Tx BD 3 Control/Status
Tx BD 3 Data Count
Tx BD 3 Data Pointer (High Word)
Tx BD 3 Data Pointer (Low Word)
Tx BD 4 Control/Status
Tx BD 4 Data Count
Tx BD 4 Data Pointer (High Word)
Tx BD 4 Data Pointer (Low Word)
Tx BD 5 Control/Status
Tx BD 5 Data Count
Tx BD 5 Data Pointer (High Word)
Tx BD 5 Data Pointer (Low Word)
Tx BD 6 Control/Status
Tx BD 6 Data Count
Tx BD 6 Data Pointer (High Word)
Tx BD 6 Data Pointer (Low Word)
Tx BD 7 Control/Status
Tx BD 7 Data Count
Tx BD 7 Data Pointer (High Word)
Tx BD 7 Data Pointer (Low Word)
Temp Transmit CRC High
Temp Transmit CRC Low
CRC_Mask_H
MAX_cnt
HADDR1
HADDR2
HADDR3
HADDR4
NMARC
CRCEC
HMASK
Name
RETRC
ABTSC
DISFC
Name
MFLR
MOTOROLA