XE8802MI035LF Semtech, XE8802MI035LF Datasheet - Page 160

• Manufacturer Part Number: XE8802MI035LF
• Description: IC DAS 16BIT FLASH 8K 100-LQFP
• Manufacturer: Semtech

Specifications of XE8802MI035LF

• Applications: Sensing Machine
• Core Processor: RISC
• Program Memory Type: FLASH (22 kB)
• Controller Series: XE8000
• Ram Size: 1K x 8
• Interface: SPI, UART
• Number Of I /o: 36
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• For Use With: XE8000MP - PROG BOARD AND PROSTART2 CARD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.5.3
The LCD driver frame frequency depends on three parameters: the selected clock source frequency, the selected
division factor and the multiplexing scheme. As shown in Figure 19-11, four different clock source frequencies can
be selected by setting the bits LcdFreq in RegLcdClkFrame. This frequency is further divided by a factor between
1 and 8 depending on the bits LcdDivFreq in RegLcdClkFrame. It further depends on the selected multiplexing
scheme (bits LcdMux in RegLcdOn). The selections are defined in Table 19-18 to Table 19-20. The frame rate
Finally, Table 19-21 shows the minimal and maximal frame rate for each multiplexing. The source frequency should
be chosen as low as possible to reduce the power consumption. Note that the precision of the frame rate depends
on the precision of the selected clock source (see clock block documentation).
© Semtech 2006
LcdSleep
FR
is then given by:
V3
V2
V1
V0
V3
V2
V1
V0
FR
=
2
⋅
LCD frame frequency selection
div
f
LCD
Frame 0
512 Hz
1024 Hz
2048 Hz
4096 Hz
⋅
mux
00
01
10
11
Lcdfreq(1:0)
Figure 19-10. Sleep mode synchronisation
3-bit Programmable divider
Lcddivfreq(2:0)
Figure 19-11: Frame Rate generation
XE8802 Sensing Machine Data Acquisition MCU
Frame 1
19-16
with ZoomingADC™ and LCD driver
Internal State generator
Sleep
LcdM ux(1:0)
Frame rate frequency
Frame 2
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