4
Interfaces
4.1
I
2
C (pin 16, pin 17)
I
2
C is in slave only.
Internal 4.7 kΩ pull-up resistor on VCC is present. It is important to avoid having other pull-up for current leakage
in low power mode.
4.2
UART (pin 2, pin 3)
UART is Universal Asynchronous Receiver/Transmitter that supports much of the functionality of the industry-
standard 16C650 UART.
These UARTs vary from industry-standard 16C650 on some minor points which are:
•
Receive FIFO trigger levels.
•
The internal register map address space, and the bit function of each register differ.
•
The deltas of the modem status signals are not available.
•
1.5 stop bits is not supported.
•
Independent receive clock feature is not supported.
UM3004
Interfaces
UM3004
-
Rev 1
page 6/17
