Z8F1680SH020SG Datasheet, PDF (245/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
220
Bit
[1]
TFST
[0]
SLAS
Description (Continued)
Transfer Status
0 = No data transfer is currently in progress.
1 = Data transfer is currently in progress.
Slave Select
Reading this bit returns the current value of the SS pin.
0 = The SS pin input is Low.
1 = The SS pin input is High.
16.4.6. ESPI State Register
The ESPI State Register, shown in Table 114, lets you observe the ESPI clock, data and
internal state.
Table 114. ESPI State Register (ESPISTATE)
Bits
7
6
5
4
3
2
1
0
Field
SCKI
SDI
ESPISTATE
Reset
0
0
0
R/W
R
R
R
Address
F65H
Bit
[7]
SCKI
[6]
SDI
[5:0]
ESPISTATE
Description
Serial Clock Input
This bit reflects the state of the serial clock pin.
0 = The SCK input pin is Low.
1 = The SCK input pin is High.
Serial Data Input
This bit reflects the state of the serial data input (MOSI or MISO depending on the MMEN
bit).
0 = The serial data input pin is Low.
1 = The serial data input pin is High.
ESPI State Machine
Indicates the current state of the internal ESPI State Machine. This information is
intended for manufacturing test purposes. The state values may change in future
hardware revisions and are not intended to be used by a software driver.
PS025015-1212
PRELIMINARY
Enhanced Serial Peripheral Interface