User's Manual

DFZM-TS2xx
Data Sheet Sheet 10 of 37 AUG 22, 2013
Proprietary Information and Specifications are Subject to Change
as an input or output and if a pullup or pulldown resistor in the pad is connected. CPU interrupts can be enabled
on each pin individually. Each peripheral that connects to the I/O pins can choose between two different I/O pin
locations to ensure flexibility in various applications.
A versatile five-channel DMA controller is available in the system, accesses memory using the XDATA memory
space, and thus has access to all physical memories. Each channel (trigger, priority, transfer mode, addressing
mode, source and destination pointers, and transfer count) is configured with DMA descriptors anywhere in
memory. Many of the hardware peripherals (AES core, flash controller, USARTs, timers, ADC interface) achieve
highly efficient operation by using the DMA controller for data transfers between SFR or XREG addresses and
flash/SRAM.
Timer 1 is a 16-bit timer with timer/counter/PWM functionality. It has a programmable prescaler, a 16-bit period
value, and five individually programmable counter/capture channels, each with a 16-bit compare value. Each of
the counter/capture channels can be used as a PWM output or to capture the timing of edges on input signals. It
can also be configured in IR Generation Mode where it counts Timer 3 periods and the output is ANDed with
the output of Timer 3 to generate modulated consumer IR signals with minimal CPU interaction.
Timer 2 (the MAC Timer) is specially designed for supporting an IEEE 802.15.4 MAC or other time-slotted
protocol in software. The timer has a configurable timer period and a 24-bit overflow counter that can be used to
keep track of the number of periods that have transpired. A 40-bit capture register is also used to record the exact
time at which a start-of-frame delimiter is received/transmitted or the exact time at which transmission ends, as
well as two 16-bit output compare registers and two 24-bit overflow compare registers that can send various
command strobes (start RX, start TX, etc.) at specific times to the radio modules.
Timer 3 and Timer 4 are 8-bit timers with timer/counter/PWM functionality. They have a programmable
prescaler, an 8-bit period value, and one programmable counter channel with an 8-bit compare value. Each of
the counter channels can be used as a PWM output.
The sleep timer is an ultralow-power timer that counts 32-kHz crystal oscillator or 32-kHz RC oscillator periods.
The sleep timer runs continuously in all operating modes except power mode 3 (PM3). Typical applications of
this timer are as a real-time counter or as a wake-up timer to come out of power mode 1 (PM1) or 2 (PM2).