ZLF645S2864GP0001 Maxim Integrated, ZLF645S2864GP0001 Datasheet - Page 94

• Manufacturer Part Number: ZLF645S2864GP0001
• Description: 8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
• Manufacturer: Maxim Integrated

Specifications of ZLF645S2864GP0001

• Core: Z8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 1 KB
• Operating Supply Voltage: 2 V to 3.6 V
• Interface Type: UART
• Number Of Programmable I/os: 5
• Number Of Timers: 2 x 8 bit, 1 x 16 bit
• Processor Series: ZLF645
• Program Memory Type: Flash

19-4572; Rev 0; 4/09
Architecture
Operation
System Bus
RxD
TxD
The UARTs consist of three primary functional blocks: transmitter, receiver, and Baud
Rate Generator. The UART transmitter and receiver function independently, but employ
the same baud rate and data format.
The UART channel can be used to communicate with a master microprocessor or a slave
microprocessor, both of which exhibit transmit and receive functionality. You can either
operate the UART channel by polling the UART Status register or via interrupts. The
UART remains active during HALT mode. If neither the transmitter nor the receiver is
enabled, the UART baud rate generator can be used as an additional timer. The UART
contains a noise filter for the receiver that can be enabled by the user.
Parity Generator
Receive Shifter
Transmit Shift
Receive Data
Transmit Data
Register
Register
Register
Figure 22. UART Block Diagram
Figure 22
Status Register
Transmitter Control
displays the UART architecture.
Control Register
ZLF645 Series Flash MCUs
Product Specification
Baud Rate
Generator
Architecture
86