z8f0813 ZiLOG Semiconductor, z8f0813 Datasheet - Page 120

• Manufacturer Part Number: z8f0813
• Description: High-performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 68. UART Address Compare Register (U0ADDR)
Table 69. UART Baud Rate High Byte Register (U0BRH)
Table 70. UART Baud Rate Low Byte Register (U0BRL)
BITS
FIELD
RESET
R/W
ADDR
BITS
FIELD
RESET
R/W
ADDR
BITS
FIELD
RESET
R/W
ADDR
PS024314-0308
UART Baud Rate High and Low Byte Registers
R/W
R/W
R/W
7
0
7
1
7
1
COMP_ADDR—Compare Address
This 8-bit value is compared to incoming address bytes.
The UART Baud Rate High and Low Byte registers
create a 16-bit baud rate divisor value (BRG[15:0]) that sets the data transmission rate
(baud rate) of the UART.
The UART data rate is calculated using the following equation:
For a given UART data rate, calculate the integer baud rate divisor value using the
following equation:
UART Baud Rate (bits/s)
UART Baud Rate Divisor Value (BRG)
R/W
R/W
R/W
6
0
6
1
6
1
R/W
R/W
R/W
5
0
5
1
5
1
=
-------------------------------------------------------------------------------- -
16
R/W
R/W
R/W
COMP_ADDR
4
0
4
1
4
1
×
System Clock Frequency (Hz)
UART Baud Rate Divisor Value
F45H
F46H
F47H
BRH
BRL
=
R/W
R/W
R/W
Round
3
0
3
1
3
1
Universal Asynchronous Receiver/Transmitter
(Table 69


Z8 Encore! XP
System Clock Frequency (Hz)
----------------------------------------------------------------- -
16
R/W
R/W
R/W
×
2
0
2
1
2
1
UART Data Rate (bits/s)
and
Product Specification
Table
R/W
R/W
R/W
1
0
1
1
1
1
®
70) combine to
F0823 Series
R/W
R/W
R/W
0
0
0
1
0
1


110