Flashcard reader and converter for reading serial and parallel flashcards
View Patent ↗A flash memory card reader and a single converter chip for reading both serial and parallel flash cards. The read has connectors for both serial and parallel data transfer flash memory cards. The reader has a single chip converter. The converter supports both serial I/O and parallel I/O. The serial I/O transfers data in multiple modes. Both single-bit and multi-bit serial data transfers modes are supported. The reader may have multiple slots, one have a connector for serial and one having a connector for parallel flash memory cards.
1. A flash memory card reader, comprising:
at least two flash memory card connectors, at least one flash memory card connector configured for serial data transfer and at least one flash memory card connector configured for parallel data transfer; and
a single-chip converter comprising:
a serial I/O circuit configured for serial data transfer, the serial I/O circuit supporting multiple serial data transfer modes; and
a parallel I/O circuit configured for parallel data transfer.
2. The flash memory card reader of claim 1 ,
wherein said serial I/O circuit is configured to communicate one bit of serial data per clock in a one-bit serial data transfer mode.
3. The flash memory card reader of claim 2 ,
wherein said serial I/O circuit is configured to communicate multiple bits of serial data per clock in a parallel serial data transfer mode.
4. The flash memory card reader of claim 1 ,
wherein said serial I/O circuit is configured to communicate multiple bits of serial data per clock in a parallel serial data transfer mode.
5. The flash memory card reader of claim 1 ,
wherein the single converter chip is further configured to perform a CRC check on received data to detect errors.
6. The flash memory card reader of claim 5 ,
wherein the single converter chip is further configured to request retransmission when an error is detected.
7. The flash memory card reader of claim 1 ,
wherein the single converter chip is further configured to store read data in a buffer.
8. The flash memory card reader of claim 1 ,
wherein the parallel I/O circuit comprises a general purpose input output circuit having at least one register or I/O port connected to external I/O pins of the single converter chip.
9. The flash memory card reader of claim 8
further comprising a CPU adapted to read from or write to said at least one register.
10. The flash memory card reader of claim 1 ,
further comprising at least two slots, one slot configured with at least one serial data transfer flash memory card connector and a second slot configured with at least one parallel data transfer flash memory card connector.
11. Apparatus, comprising:
a single-chip converter comprising:
a serial I/O circuit configured for serial data transfer, the serial I/O circuit supporting multiple serial data transfer modes; and
a parallel I/O circuit configured for parallel data transfer.
12. Apparatus according to claim 11 ,
wherein said serial I/O circuit is configured to communicate one bit of serial data per clock in a one-bit serial data transfer mode.
13. Apparatus according to claim 12 ,
wherein said serial I/O circuit is configured to communicate multiple bits of serial data per clock in a parallel serial data transfer mode.
14. Apparatus according to claim 11 ,
wherein said serial I/O circuit is configured to communicate multiple bits of serial data per clock in a parallel serial data transfer mode.
15. Apparatus according to claim 11 ,
wherein the single converter chip is further configured to perform a CRC check on received data to detect errors.
16. Apparatus according to claim 15 ,
wherein the single converter chip is further configured to request retransmission when an error is detected.
17. Apparatus according to claim 11 ,
wherein the single converter chip is further configured to store read data in a buffer.
18. Apparatus according to claim 11 ,
wherein the parallel I/O circuit comprises a general purpose input output circuit having at least one register or I/O port connected to external I/O pins of the single converter chip.
19. Apparatus according to claim 18 ,
further comprising a CPU adapted to read from or write to said at least one register.