Pcmcia Interface General Control Register B (Pgcrb) - Freescale Semiconductor MPC850 User Manual

Table 16-10. PER Field Descriptions (Continued)
Bits Name
17 CB_EVS2 Enable for voltage sense 2 for card B changed. Setting this bit enables the interrupt on any
signal change.
18 CB_EWP Enable for write protect for card B changed. Setting this bit enables the interrupt on any signal
change.
19 CB_ECD2 Enable for card detect 2 for card B changed. Setting this bit enables the interrupt on any
signal change.
20 CB_ECD1 Enable for card detect 1 for card B changed. Setting this bit enables the interrupt on any
signal change.
21 CB_EBVD2 Enable for battery voltage/SPKR_B input for card B changed. Setting this bit enables the
interrupt on any signal change.
22 CB_EBVD1 Enable for battery voltage/STSCHG_B input for card B changed
23 — Reserved, should be 0.
24 CB_ERDY_L Enable for RDY/IRQ of card B pin is low
25 CB_ERDY_H Enable for RDY/IRQ card B pin is high
26 CB_ERDY_R Enable for RDY/IRQ card B pin rising edge detected
27 CB_ERDY_F Enable for RDY/IRQ card B pin falling edge detected
28–31 — Reserved, should be 0.
16.4.4 PCMCIA Interface General Control Register B
(PGCRB)
PGCRB, shown in Figure 16-6, is used to reset the PCMCIA cards, disable the output of
the external latches, and specify the source used for a DMA request.
Bit 0 1 2
Field
Reset
R/W
Addr
Bit 16 17 18
Field CBDREQ
Reset
R/W
Addr
Figure 16-6. PCMCIA Interface General Control Register B (PGCRB)
3 4 5 6
CBIREQLVL
(IMMR & 0xFFFF0000) + 0x0E4 (PGCRB)
19 20 21 22
—
(IMMR & 0xFFFF0000) + 0x0E6 (PGCRB)
Chapter 16. PCMCIA Interface
Description
7 8 9
Undefined
R/W
23 24 25
CBOE CBRESET
Undefined
R/W
Programming Model
10 11 12 13 14
CBSCHLVL
26 27 28 29 30
—
15
31