XE8805AMI028LF Semtech, XE8805AMI028LF Datasheet - Page 144

• Manufacturer Part Number: XE8805AMI028LF
• Description: IC DAS 16BIT FLASH 8K MTP 64LQFP
• Manufacturer: Semtech

Specifications of XE8805AMI028LF

• Applications: Sensing Machine
• Core Processor: RISC
• Program Memory Type: FLASH (22 kB)
• Controller Series: XE8000
• Ram Size: 512 x 8
• Interface: UART, USRT
• Number Of I /o: 24
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Supply Voltage Range: 2.4V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LQFP
• No. Of Pins: 64
• For Use With: XE8000MP - PROG BOARD AND PROSTART2 CARD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.5 Block schematic
20.6
Counters are enabled by CntAEnable, CntBEnable, CntCEnable, and CntDEnable in RegCntOn.
To stop the counter X, CntXEnable must be reset. To start the counter X, CntXEnable must be set. When
counters are cascaded, CntAEnable and CntCEnable also control respectively the counters B and D.
In the control registers, all registers must be written in this order: RegCntCtrlCk, RegCntConfig1, RegCntConfig2
and all RegCntX because several bits have no default values at reset.
All counters have a corresponding 8-bit read/write register: RegCntA, RegCntB, RegCntC, and RegCntD. When
read, these registers contain the counter value (or the captured counter value). When written, they modify the
counter comparison values.
For a correct acquisition of the counter value, use one of the three following methods:
© Semtech 2006
ckrcext/4
ckrcext
ck128
ck32k
PA(0)
PA(1)
PA(2)
PA(3)
ck1k
1) Stop the concerned counter, perform the read operation and restart the counter. While stopped, the
General counter registers operation
counter content is frozen and the counter does not take into account the clock edges delivered on the
external pin.
Figure 20-1: Counters/timers block schematic
RegCntB (write)
RegCntC (write)
RegCntD (write)
RegCntA (write)
Counter B
Counter C
Counter D
Counter A
20-4
PWM
Capture
ck1k
ck32k
RegCntA (read)
RegCntB (read)
RegCntC (read)
RegCntD (read)
PB(0)
PB(1)
XE8805/05A
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