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 (TPD). 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:
READ TIMING
CS
CLK
DI
An
•••
1
1
0
A0
High-Z
DO
0
Dx
D0
Dx
D0
Dx
D0
•••
•••
•••
DS21929D-page 14
© 2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
