xe8802 Semtech Corporation, xe8802 Datasheet - Page 174

• Manufacturer Part Number: xe8802
• Description: Data Acquisition Soc With 16+10 Bit Zoomingadc? Embedded Risc Controller And Lcd Driver
• Manufacturer: Semtech Corporation

20.1 Features
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20.2 Overview
Counter A and Counter B are 8-bits counters and can be combined to form a 16-bit counter. Counter C and
Counter D exhibit the same feature.
The counters can also be used to generate two PWM outputs on PB[0] and PB[1]. In PWM mode one can generate
PWM functions with 8, 10, 12, 14 or 16 bits wide counters.
The counters A and B can be captured by events on an internal or an external signal. The capture can be
performed on both 8-bit counters running individually on two different clock sources or on both counters chained to
form a 16-bit counter. In any case, the same capture signal is used for both counters.
When the counters A and B are not chained, they can be used in several configurations: A and B as counters, A
and B as captured counters, A as PWM and B as counter, A as PWM and B as captured counter.
When the counters C and D are not chained, they can be used either both as counters or counter C as PWM and
counter D as counter.
20.3 Register map
© Semtech 2006
4 x 8-bits timer/counter modules or 2 x 16-bits timers/counter modules
Each with 4 possible clock sources
Up/down counter modes
Interrupt and event generation
Capture function (internal or external source)
Rising, falling or both edge of capture signal (except for xtal 32 kHz, only rising edge)
PA[3:0] can be used as clock inputs (debounced or direct, frequency divided by 2 or not)
2 x 8 bits PWM or 2 x 16 bits PWM
PWM resolution of 8, 10, 12, 14 or 16 bits
Complex mode combinations are possible
7-0
7-0
bit
CounterA
CounterA
RegCntA
rw
W
R
XE8802 Sensing Machine Data Acquisition MCU
Table 20-1. Counter registers
RegCntConfig1
RegCntConfig2
Table 20-2. RegCntA
register name
00000000 nresetglobal
00000000 nresetglobal
RegCntCtrlCk
RegCntOn
RegCntA
RegCntB
RegCntC
RegCntD
20-2
reset
with ZoomingADC™ and LCD driver
8-bits comparison value
8-bits counter value
function
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