User Manual

TriFlash Interface Description

3.1.2. Pin Assignments in SPI Mode

Table 3-2. SPI Bus Mode Pad Definition

Pin # Name Type

Function Comment

H6, F1, C1, A2, A6 V

S Supply Voltage

H7, H2, D1, B1, A7 V

S Supply Voltage Ground

G2 DataOut I/O Device to Host Data and Status

G3 DAT1 I/O Unused Pull up to VDD

G6 DAT2 I/O Unused Pull up to VDD

G5 CS I Chip Select (Active low)

G1 CLK I Clock

G4 DataIn I Host to Device Commands and Data

B5 WPB I Write Protect (Active low)

G7 RSTB I Reset (Active low)

B2 RDY/BSY O Ready/Busy Interrupt

B3 SEL_A I Defines I/F Pull up to VDD

B4 SEL_B I Defines I/F Pull up to VDD

3.1.3. Registers

Each device has a set of information registers. A detailed description is given in Section 3.5.

Table 3-3. TriFlash Registers

Name Width Description

CID 128 Card identification number: individual card number for identification.

RCA

16 Relative card address: local system address of a device, dynamically

suggested by the device and approved by the host during initialization.

CSD 128 Card specific data: information about the device operation conditions.

SCR 64 SD Configuration Register: information about the TriFlash’s special

features capabilities.

OCR 32 Operation Condition Register.

The host may reset the devices by switching the power supply off and on again, or toggling the Reset pin. The

device has its own power-on detection circuitry, which puts the device into an idle state after the power-on. The

device can also be reset by sending the GO_IDLE (CMD0) command.

S=power supply; I=input; O=output using push-pull drivers.

The RCA register is not used (not available) in SPI Mode.