ACE25C200G datasheet(21/48 Pages) ACE

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ACE25C200G

2M BIT SPI NOR FLASH

VER 1.1

Fast Read (0BH)

See Figure 8, the Read Data Bytes at Higher Speed (Fast Read) instruction is for quickly reading

data out. It is followed by a 3-byte address (A23-A0) and a dummy byte, each bit being latched-in

during the rising edge of SCLK. Then the memory content, at that address, is shifted out on SO, each

bit being shifted out, at a Max frequency fc, during the falling edge of SCLK. The first byte addressed

can be at any location. The address is automatically incremented to the next higher address after

each byte of data is shifted out.

Figure 8 Fast Read Sequence Diagram

Figure 8

Dual Output Fast Read (3BH)

See Figure 9, the Dual Output Fast Read instruction is followed by 3-byte address (A23-A0) and a

dummy byte, each bit being latched in during the rising edge of SCLK, then the memory contents are

shifted out 2-bit per clock cycle from SI and SO. The first byte addressed can be at any location. The

address is automatically incremented to the next higher address after each byte of data is shifted out.

Figure 9 Dual Output Fast Read Sequence Diagram

Figure 9

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