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Functional Description for the MSP50C614
1-7Introduction to the MSP50C6xx
Figure 1–2. Oscillator and PLL Connection
MSP50P614
MSP50C6xx
OSCIN OSCOUT PLL
C
(PLL)
= 3300 pF†
22 pF†
22 pF†
10 Mن
10 Mن
32.768 kHz†
†
Keep these components as close as possible to the OSC
IN
, OSC
OUT
, and PLL pins.
a) Crystal Reference Oscillator Connections
b) Resistor Trim Oscillator Connections
MSP50C6xx
MSP50P614
OSCIN OSCOUT PLL
R
(RTO)
=
470
kΩ
1%†
C
(PLL)
= 3300 pF†
†
Keep these components as close as possible to the OSC
IN
, OSC
OUT
, and PLL pins.
The peripheral consists of five 8-bit wide general-purpose I/O ports, one 8-bit
wide dedicated input port, and one 16-bit wide dedicated output port. The
general-purpose I/O ports are bit-wise programmable as either
high-impedance inputs or as totem-pole outputs. They are controlled via
addressable I/O registers. The input-only port has a programmable pullup
option (100-kΩ minimum resistance) and a dedicated service interrupt. These
features make the input port especially useful as a key-scan interface.
A simple one-bit comparator is also included in the periphery. The comparator
is enabled by a control register, and its input pins are shared with two pins in
one of the general-purpose I/O ports.