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M9328MX21ADSE User’s Manual, Rev. A
3-16 Freescale Semiconductor
Table 3-4. CPU to Option Card PK2 Connector Signals
Pin(s) Signal Description
1, 60 VCC +3.0 VDC power
2NFIO1 PC_VS2 PCMCIA VOLTAGE SENSE 2 — Input signal to select card voltage*
3NFIO0 PC_BVD1 PCMCIA BATTERY VOLTAGE DETECT 1 — Input signal to report battery status*
4NFIO3 PC_WP PCMCIA WRITE PROTECT — Input signal from the PCMCIA card*
5NFIO2 PC_VS1 PCMCIA VOLTAGE SENSE 1 input signal to select PCMCIA card voltage*
6, 9 P2.5V + 2.5 VDC power
7NFIO4 PC_READY PCMCIA READY — Input signal to indicate the card is ready for access*
8NFIO5 PC_WAIT PCMCIA WAIT — Input signal to extend the current access*
10 NFIO7 PC_CD1
PCMCIA CARD DETECT 1 — Input signal to indicate a card is inserted*
11 NFIO6 PC_CD2
PCMCIA CARD DETECT 2 — Input signal to indicate a card is inserted*
12 NFRE_B PC_RW
PCMCIA READ/WRITE — Data direction control, active low to write*
13 NFWE_B PC_BVD2 PCMCIA BATTERY VOLTAGE DETECT 2 — Input signal to report battery status*
14, 53 P1.8V +1.8 VDC power
15 NFALE PC_OE
PCMCIA OUTPUT ENABLE — Output used to enable memory read data*
16 NFCLE PC_POE PCMCIA Buffer OUTPUT ENABLE — Output used tri-state control signals*
17 NFWP_B PC_CE2 PCMCIA CARD ENABLE 2 — Output used to enable odd bytes*
18 NFCE_B PC_CE1 PCMCIA CARD ENABLE 1 — Output used to enable even bytes*
19 NFRB PC_RST PCMCIA RESET — Output to reset a card’s Configuration Option Register*
20 PC_PWRON PCMCIA input to indicate card power is applied and stable
21 D23 DATA BIT 23 — Bidirectional data bit from the processor
22 D24 DATA BIT 24 — Bidirectional data bit from the processor
23 D22 DATA BIT 22 — Bidirectional data bit from the processor
24 D25 DATA BIT 25 — Bidirectional data bit from the processor
25 D21 DATA BIT 21 — Bidirectional data bit from the processor
26 D26 DATA BIT 26 — Bidirectional data bit from the processor
27 D20 DATA BIT 20 — Bidirectional data bit from the processor
28 D27 DATA BIT 27 — Bidirectional data bit from the processor
29 D19 DATA BIT 19 — Bidirectional data bit from the processor
30 D28 DATA BIT 28 — Bidirectional data bit from the processor
31 D18 DATA BIT 18 — Bidirectional data bit from the processor