Z51F3220FNX Datasheet, PDF (217/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
USI0SCLR (USI0 SCL Low Period Register: For I2C mode) : E6H
7
6
5
4
3
USI0SCLR7 USI0SCLR6 USI0SCLR5 USI0SCLR 4 USI0SCLR 3
R/W
R/W
R/W
R/W
R/W
2
USI0SCLR 2
R/W
1
0
USI0SCLR 1 USI0SCLR 0
R/W
R/W
Initial value : 00H
USI0SCLR[7:0]
This register defines the high period of SCL0 when it operates in
I2C master mode.
The base clock is SCLK, the system clock, and the period is
calculated by the formula: tSCLK X (4 X USI0SCLR +2) where
tSCLK is the period of SCLK.
USI0SAR (USI0 Slave Address Register: For I2C mode) : DDH
7
6
5
4
3
USI0SLA6 USI0SLA5 USI0SLA4 USI0SLA3 USI0SLA2
R/W
R/W
R/W
R/W
R/W
2
USI0SLA1
R/W
1
0
USI0SLA0 USI0GCE
R/W
R/W
Initial value : 00H
USI0SLA[6:0]
UPM[1:0]
These bits configure the slave address of I2C when it operaties in
I2C slave mode.
This bit decides whether I2C allows general call address or not in
I2C slave mode.
0
Ignore general call address
1
Allow general call address
PS029902-0212
PRELIMINARY
215