LM3S8970 Datasheet, PDF (100/554 Pages) Texas Instruments – Stellaris® LM3S8970 Microcontroller

System Control
Register 17: Device Capabilities 4 (DC4), offset 0x01C
This register provides a list of features available in the system. The Stellaris family uses this register
format to indicate the availability of the following family features in the specific device: Ethernet MAC
and PHY, GPIOs, and CCP I/Os. The format of this register is consistent with the RCGC2, SCGC2,
and DCGC2 clock control registers and the SRCR2 software reset control register.
Device Capabilities 4 (DC4)
Base 0x400F.E000
Offset 0x01C
Type RO, reset 0x5100.007F
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved EPHY0 reserved EMAC0
reserved
E1588
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
1
0
1
0
0
0
1
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
Bit/Field
31
30
29
28
27:25
24
23:7
6
5
4
Name
reserved
EPHY0
reserved
EMAC0
reserved
E1588
reserved
GPIOG
GPIOF
GPIOE
Type
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
1
0
1
0
1
0
1
1
1
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Ethernet PHY0 Present
When set, indicates that Ethernet PHY module 0 is present.
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Ethernet MAC0 Present
When set, indicates that Ethernet MAC module 0 is present.
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
1588 Capable
When set, indicates that that EMAC0 is 1588-capable.
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
GPIO Port G Present
When set, indicates that GPIO Port G is present.
GPIO Port F Present
When set, indicates that GPIO Port F is present.
GPIO Port E Present
When set, indicates that GPIO Port E is present.
100
June 22, 2010
Texas Instruments-Production Data