Atmel AT85DVK-07 Especificaciones descargar pdf (Pagina 203)

203

AT85C51SND3Bx

7632A–MP3–03/06

Reset Value = 0000 0000b

2 DATEN

Data Transfer Enable Bit

Set to enable data transmission or reception immediately or after response has

been received.

Cleared by hardware after the CRC reception in reception mode or after the busy

status if any in transmission mode.

1 RXCEN

Response Command Enable Bit

Set to enable the reception of a response following a command transmission.

Cleared by hardware when response is received.

0 TXCEN

Command Transmission Enable Bit

Set to enable transmission of the command FIFO to the card.

Cleared by hardware when command is transmitted.

Table 223. MMCON2 Register

MMCON2 (1.B3h) – MMC Control Register 2

7 6 5 4 3 2 1 0

FCK DCR CCR DBSIZE1 DBSIZE0 DATD1 DATD0 MMCEN

Bit

Number

Bit

Mnemonic

Description

7 FCK

MMC Force Clock Bit

Set to enable the MCLK clock out permanently.

Clear to disable the MCLK clock and enable flow control.

6 DCR

Data Controller Reset Bit

Set to reset the data line controller in case of transfer abort, or to reset CRC16S

bit after an error occurs.

Cleared by hardware after the data line controller reset is achieved.

5 CCR

Command Controller Reset Bit

Set to reset the command line controller in case of transfer abort.

Cleared by hardware after the data line controller reset is achieved.

4-3 DBSIZE1:0

Data Bus Size

Refer to Ta bl e 219 for bits description.

2-1 DATD1:0

Data Transmission Delay Bits

Used to delay the data transmission after a response from 3 MMC clock periods

(all bits cleared) to 9 MMC clock periods (all bits set) by step of 2 MMC clock

periods.

0 MMCEN

MMC Clock Enable Bit

Set to enable the MMC clocks and activate the MMC controller.

Clear to disable the MMC clocks and freeze the MMC controller.

Table 224. MMBLP Register

MMCON2 (1.B4h) – MMC Block Length LSB Register

7 6 5 4 3 2 1 0

BLEN7 BLEN6 BLEN5 BLEN4 BLEN3 BLEN2 BLEN1 BLEN0

Bit

Number

Bit

Mnemonic Description

1 2 ... 198 199 200 201 202 203 204 205 206 207 208 ... 262 263

Atmel AT85DVK-07 Especificaciones Pagina 203

Comentarios a estos manuales

Atmel AT85DVK-07 Especificaciones Pagina 203

Comentarios a estos manuales

Relacionado con productos y manuales para Redes Atmel AT85DVK-07