ZLF645S2864GP0001T Maxim Integrated, ZLF645S2864GP0001T Datasheet - Page 28

• Manufacturer Part Number: ZLF645S2864GP0001T
• Description: 8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
• Manufacturer: Maxim Integrated

Specifications of ZLF645S2864GP0001T

• 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

PS026408-1208
Open-Drain
I/O
Out
In
Port 0
Port 0 is an 8-bit bidirectional CMOS-compatible port. Its eight I/O lines are configured
under software control to create a nibble I/O port. The output drivers are push/pull or
open-drain, controlled by bit 2 of the
If one or both nibbles are required for I/O operation, they must be configured by writing to
the
configured as an input port.
Port 0, bit 7 is used as the transmit output of the UART when UART Tx is enabled. The
I/O function of Port 0, bit 7 is overridden by the UART serial output (TxD) when UART
Tx is enabled (UCTL[7] = 1). The pin must be configured as an output for TxD data to
reach the pin (P01M[6] = 0).
An optional pull-up transistor is available as an user-selectable flash programming option
on all Port 0 bits with nibble select.
Port 0/1 Mode
FLASH MCU
ZLF645
Register. After a hardware reset or a Stop Mode Recovery, Port 0 is
Figure 6. Port 0 Configuration
4
4
Figure 6
Port Configuration
displays the Port 0 configuration.
Port 0 (I/O)
Register.
Product Specification
V
DD
Option
Resistive pull-up
Flash Programming
transistor
Pad
Port 0
20