mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 976

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

17.5.4 PCMCIA Interface General Control Register B
The PCMCIA interface general control register B (PGCRB) provides control for the IREQ
and STSCHG interrupt levels, This register also controls the PCMCIA output port signals.
When the PCMCIA controller is not operating, the CBOE and CBRESET bits can be used
to access the OP[2:3] pins as general-purpose output pins without configuring any other
PCMCIA register.
CBIRQLVL—Card B Interrupt Request Level
Only one bit of this field must be set at any given time.
CBSCHLVL—Card B STSCHG Level
Only one bit of this field must be set at any given time.
CBDREQ—Card B DMA Request
This field defines the pin to be used as the internal DMA request to IDMA channel 2.
Bits 18–23—Reserved
These bits are reserved and must be set to 0.
PGCRB
NOTE: — = Undefined.
RESET
RESET
FIELD
ADDR
FIELD
ADDR
R/W
R/W
BIT
BIT
0x = Disable internal DMA request from Slot B.
10 = Enable IOIS16_B as internal DMA request for Slot B.
11 = Enable SPKR as internal DMA request for Slot B.
16
0
CBDREQ
R/W
—
Note: If the PCMCIA controller is programmed to enable internal DMA, then the port C
17
1
18
registers must not be configured to select DREQ2.
2
Freescale Semiconductor, Inc.
For More Information On This Product,
19
3
CBIRQLVL
R/W
—
20
MPC823 REFERENCE MANUAL
4
RESERVED
R/W
—
Go to: www.freescale.com
21
5
22
6
(IMMR & 0xFFFF0000) + 0xE4
(IMMR & 0xFFFF0000) + 0xE4
23
7
CBOE
R/W
24
—
8
CBRES
R/W
25
ET
9
—
10
26
11
27
CBSCHLVL
R/W
—
12
28
RESERVED
R/W
—
PCMCIA Interface
13
29
14
30
17-15
15
31