93XX46X/56X/66X/76X/86X
3.7
READ
The
READ
instruction outputs the serial data of the
addressed memory location on the DO pin. A dummy
zero bit precedes the 8-bit (If ORG pin is low or A-version
devices) or 16-bit (If ORG pin is high or B-version
devices) output string. The output data bits will toggle on
the rising edge of the CLK and are stable after the spec-
ified time delay (T
PD
). Sequential read is possible when
CS is held high. The memory data will automatically cycle
to the next register and output sequentially.
FIGURE 3-7:
CS
READ TIMING
CLK
DI
1
1
0
An
鈥⑩€⑩€?/div>
A0
DO
High-Z
0
Dx
鈥⑩€⑩€?/div>
D0
Dx
鈥⑩€⑩€?/div>
D0
Dx
鈥⑩€⑩€?/div>
D0
DS21929D-page 14
漏
2007 Microchip Technology Inc.
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