Specifications

CY14B101P
Document Number: 001-44109 Rev. *O Page 15 of 36
AutoStore Disable (ASDISB) instruction
AutoStore is enabled by default in CY14B101P. The AutoStore
Disable instruction disables the AutoStore on CY14B101P. This
setting is not nonvolatile and needs to be followed by a STORE
sequence if this is desired to survive the power cycle.
To issue this instruction, the device must be write enabled
(WEN = ‘1’). The instruction is performed by transmitting the
ASDISB opcode on the SI pin following the falling edge of CS
.
The WEN bit is cleared on the positive edge of CS
following the
ASDISB instruction.
HOLD Pin Operation
The HOLD pin is used to pause the serial communication. When
the device is selected and a serial sequence is underway, HOLD
is used to pause the serial communication with the master device
without resetting the ongoing serial sequence. To pause, the
HOLD
pin must be brought LOW when the SCK pin is LOW. CS
pin must remain LOW along with HOLD pin to pause serial
communication. While the device serial communication is
paused, inputs to the SI pin are ignored and the SO pin is in the
high impedance state. To resume serial communication, the
HOLD
pin must be brought HIGH when the SCK pin is LOW
(SCK may toggle during HOLD
).
Figure 18. AutoStore Enable Operation
Figure 19. AutoStore Disable Operation
0 1 0 1 1 0 0 1
CS
SCK
SI
SO
HI-Z
0 1 2 3 4 5 6 7
0 0 0 1 1 0 0 1
CS
SCK
SI
SO
HI-Z
0 1 2 3 4 5 6 7
Figure 20. HOLD Operation
~
~
CS
SCK
HOLD
SO
Not Recommended for New Designs