Support Information
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| Pin(s) | Signal |
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| A1 | SD1_CLK |
| SD/MMC CLOCK — Clock output to SD/MMC card |
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| A2 | SD1_CMD |
| SD/MMC COMMAND — Serial command bit to SD/MMC card, bidirectional |
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| A3 | SD1_D3 |
| SD/MMC DATA BIT 3 — Serial data bit to SD/MMC card, bidirectional |
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| A4 | SD1_D2 |
| SD/MMC DATA BIT 2 — Serial data bit to SD/MMC card, bidirectional |
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| A5 | SD1_D1 |
| SD/MMC DATA BIT 1 — Serial data bit to SD/MMC card, bidirectional |
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| A6 | SD1_D0 |
| SD/MMC DATA BIT 0 — Serial data bit to SD/MMC card, bidirectional |
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| A7 | UART1_RTS |
| UART1 REQUEST TO SEND — Active low input signal |
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| A8 | UART1_CTS |
| UART1 CLEAR TO SEND — Active low output signal |
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| A9 | UART1_RXD |
| UART1 RECEIVED DATA — Serial input signal |
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| A10 | UART1_TXD |
| UART1 TRANSMITTED DATA — Serial output signal |
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| A11 | UART3_RTS |
| UART3 REQUEST TO SEND — Active low input signal |
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| A12 | UART3_CTS |
| UART3 CLEAR TO SEND — Active low output signal |
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| A13 | UART3_RXD |
| UART3 RECEIVED DATA — Serial input signal |
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| A14 | UART3_TXD |
| UART3 TRANSMITTED DATA — Serial output signal |
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| A15 | UART2_RTS |
| UART2 REQUEST TO SEND — Active low input signal |
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| A16 | UART2_CTS |
| UART2 CLEAR TO SEND — Active low output signal |
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| B1 | KP_ROW5 |
| KEYPAD ROW 5 — Bidirectional signal used to scan a keypad |
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| B2 | KP_ROW4 |
| KEYPAD ROW 4 — Bidirectional signal used to scan a keypad |
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| B3 | KP_ROW3 |
| KEYPAD ROW 3 — Bidirectional signal used to scan a keypad |
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| B4 | KP_ROW2 |
| KEYPAD ROW 2 — Bidirectional signal used to scan a keypad |
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| B5 | KP_ROW1 |
| KEYPAD ROW 1 — Bidirectional signal used to scan a keypad |
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| B6 | KP_ROW0 |
| KEYPAD ROW 0 — Bidirectional signal used to scan a keypad |
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| B7 | KP_COL5 |
| KEYPAD COLUMN 5 — Bidirectional signal used to scan a keypad |
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| B8 | KP_COL4 |
| KEYPAD COLUMN 4 — Bidirectional signal used to scan a keypad |
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| B9 | KP_COL3 |
| KEYPAD COLUMN 3 — Bidirectional signal used to scan a keypad |
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| B10 | KP_COL2 |
| KEYPAD COLUMN 2 — Bidirectional signal used to scan a keypad |
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| B11 | KP_COL1 |
| KEYPAD COLUMN 1 — Bidirectional signal used to scan a keypad |
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| B12 | KP_COL0 |
| KEYPAD COLUMN 0 — Bidirectional signal used to scan a keypad |
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| B13 | SAP_RXD |
| SYCHRONOUS AUDIO PORT RECEIVED DATA — serial data input |
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| B14 | SAP_FS |
| SYCHRONOUS AUDIO PORT FRAME SYNC — Bidirectional, output in master mode, |
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| input in slave mode |
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| M9328MX21ADSE User’s Manual, Rev. A | |
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| Freescale Semiconductor | ||