ZLF645S0P2032G Zilog, ZLF645S0P2032G Datasheet - Page 89

• Manufacturer Part Number: ZLF645S0P2032G
• Description: Microcontrollers (MCU) 32K Flash 512B RAM 20 pin
• Manufacturer: Zilog

Specifications of ZLF645S0P2032G

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 512 KB
• Interface Type: ICP, UART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-20
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: Details

PS026407-0408
1
0
Idle state
of line
1
0
Idle state
of line
Data Format
Transmitting Data Using Polled Method
Start
The UART transmits and receives data in an 8-bit data format, with the least significant bit
(lsb) occurring first. An even- or odd-parity bit can be optionally added to the data stream.
Each character begins with an active Low Start bit and ends with either 1 or 2 active High
Stop bits.
UARTs with or without parity, respectively.
Follow the steps below to transmit data using the polled method of operation:
1. Write to the Baud Rate Generator Constant (BCNST) register, address
2. Write 0 to bit 6 of the P01M register.
3. Write to the UART Control register (UCTL) to:
Start
appropriate baud rate.
(a) Set the transmit enable bit, UCTL[7], to enable the UART for data transmission.
(b) If parity is appropriate, set the parity enable bit, UCTL[4] to 1 and select either
Figure 23. UART Asynchronous Data Format without Parity
Bit 0
Figure 24. UART Asynchronous Data Format with Parity
LSB
even- or odd-parity (UCTL[3]).
Figure 23
Bit 0
LSB
Bit 1
Bit 1
and
Bit 2
Figure 24
Bit 2
Bit 3
Data field
Bit 3
Data field
display the asynchronous data format employed by the
Bit 4
Bit 4
Bit 5
Bit 5
Bit 6
Bit 6
ZLF645 Series Flash MCUs
Bit 7
Bit 7
Product Specification
MSB
Bit 7
MSB
Stop bit(s)
1
0F4h
Stop bit(s)
2
1
2
, to set the
Operation
81