Z8F1680SH020SG Datasheet, PDF (243/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
218
Bit
Description (Continued)
[4:2]
Number of Data Bits Per Character to Transfer
NUMBITS[2:0] This field contains the number of bits to shift for each character transfer. For information
about valid bit positions when the character length is less than 8 bits, see the description
of the ESPI Data Register on page 213.
000 = 8 bits
001 = 1 bit
010 = 2 bits
011 = 3 bits
100 = 4 bits
101 = 5 bits
110 = 6 bits
111 = 7 bits
[1]
SSIO
Slave Select I/O
This bit controls the direction of the SS pin. In single MASTER Mode, SSIO is set to 1
unless a separate GPIO pin is being used to provide the SS output function. In the SPI
Slave or multi-Master configuration, SSIO is set to 0.
0 = SS pin configured as an input (SPI SLAVE and MULTI-MASTER modes).
1 = SS pin configured as an output (SPI SINGLE MASTER Mode).
[0]
SSPO
Slave Select Polarity
This bit controls the polarity of the SS pin.
0 = SS is active Low. (SSV = 1 corresponds to SS = 0).
1 = SS is active High. (SSV = 1 corresponds to SS = 1).
PS025015-1212
PRELIMINARY
Enhanced Serial Peripheral Interface