28 COMPACTFLASH
S1C38000 TECHNICAL MANUAL
EPSON
261
bits 3–2
CFVS[2:1]# IN
Negative interrupt on active low, voltage sense pins, CFVS[2:1]#2.
bits 1–0
CFCD[2:1]# IN
Negative interrupt on active low, card detect pins, CFCD[2:1]#3.
Notes:
1 Input/interrupt isolated during RESET# or CARDEN=0 or CFCD[2:1]# =1, edge
triggered.
2 Input/interrupt isolated during RESET# or CARDCDEN=0, edge triggered.
3 Input/interrupt isolated during RESET# or CARDCDEN=0.
Input must be stable for 4 RTCLKs to be recognized.
bits 15–0
Interrupt Enable Mask bit
0
Interrupt Disable (default)
1
Interrupt Enable.
bits 15–0
Masked Interrupt Status bit (Read Only)
0
Either mask IRQ bit disabled or IRQ inactive (default)
1
Both mask IRQ bit enabled and IRQ active
bit 15
CFRST
CompactFlash Card Reset output (software controlled pin, active high), driven low
during RESET#, CARDEN = 0, CFCD2#, or CFCD1# sampled high (default 0).
bit 14
CFVC3
CompactFlash voltage control output to CompactFlash power supply (software
controlled pin, active high), driven low during RESET#, APDEN = 1 and CFCD2# or
CFCD1# is high (default 0).
bit 13
CFSHDN#
CompactFlash Shutdown control output to CompactFlash power supply (software
controlled pin, default 1).
CompactFlash Input Interrupt Enable/Mask Register
CF[04h]
Default = 0000 0000h
Read/Write
n/a
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CFWP
Inactive
IRQ
Mask
CFREADY
Inactive
IRQ
Mask
CFBVD2
Inactive
IRQ
Mask
CFBVD1
Inactive
IRQ
Mask
CFVS2#
Inactive
IRQ
Mask
CFVS1#
Inactive
IRQ
Mask
CFCD2#
High
IRQ
Mask
CFCD1#
High
IRQ
Mask
CFWP
Active
IRQ
Mask
CFREADY
Active
IRQ
Mask
CFBVD2
Active
IRQ
Mask
CFBVD1
Active
IRQ
Mask
CFVS2#
Active
IRQ
Mask
CFVS1#
Active
IRQ
Mask
CFCD2#
Low
IRQ
Mask
CFCD1#
Low
IRQ
Mask
15
14
13
12
11
10
9876543210
CompactFlash Input Interrupt Mask Status Register
CF[08h]
Default = 0000 0000h
Read Only
n/a
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CFWP
Inactive
IRQ
Mask
Status
CFREADY
Inactive
IRQ
Mask
Status
CFBVD2
Inactive
IRQ
Mask
Status
CFBVD1
Inactive
IRQ
Mask
Status
CFVS2#
Inactive
IRQ
Mask
Status
CFVS1#
Inactive
IRQ
Mask
Status
CFCD2#
High
IRQ
Mask
Status
CFCD1#
High
IRQ
Mask
Status
CFWP
Active
IRQ
Mask
Status
CFREADY
Active
IRQ
Mask
Status
CFBVD2
Active
IRQ
Mask
Status
CFBVD1
Active
IRQ
Mask
Status
CFVS2#
Active
IRQ
Mask
Status
CFVS1#
Active
IRQ
Mask
Status
CFCD2#
Low
IRQ
Mask
Status
CFCD1#
Low
IRQ
Mask
Status
15
14
13
12
11
10
9876543210
CompactFlash Output Control Register
CF[0Ch]
Default = 0000 2080h
Read/Write
n/a
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CFRST
CFVC3 CFSHDN# reserved
CFWP CFREADY CFBVD2 CFBVD1 APDEN CARDCDEN CARDEN GLOBALEN CFCD2# CFCD1# CFVS2# CFVS1#
15
14
13
12
11
10
9876543210