XE8802MI035LF Semtech, XE8802MI035LF Datasheet - Page 163

• 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

supply voltage VBAT. The voltage on V3 should not exceed 5.5V. The voltage on pad_vgen_v1 should not exceed
VBAT.
Figure 19-13 shows the external connections to be made in 1/2 bias mode. Part (a) of the figure shows the use of
the internal voltage reference. In this case, V1=V2=1.2V and V3=2.4V. Part (b) of the figure shows the use of an
external voltage reference. The external reference can be connected to one of the pins pad_vgen_v1 or
pad_vgen_v3. Table 19-25 shows the voltage generated on V1 and V3 depending on the connection of the
external reference voltage Vext. The external voltage may or may not be identical to the circuit supply voltage
VBAT. The voltage on V3 should not exceed 5.5V.
© Semtech 2006
Table 19-24. V1, V2 and V3 as a function of the external reference connection in 1/3 bias mode
Table 19-25. V1 and V3 as a function of the external reference connection in 1/2 bias mode
Figure 19-12: Generation of LCD voltage with external capacitors for 1/3 bias mode.
Vext connection
pad_vgen_v1
pad_vgen_v2
pad_vgen_v3
VgenOff = 0
VgenRefEn = 1
VgenMode = 0
VGEN
1.2V v oltage
ref erence
(a)
Vext connection
pad_vgen_v1
pad_vgen_v3
LCD driv er
pad_v gen_v b
pad_v gen_v 3
pad_v gen_v 2
pad_v gen_v 1
pad_v gen_v a
(1/3) ⋅Vext
(1/2)⋅Vext
XE8802 Sensing Machine Data Acquisition MCU
V1 (V)
Vext
C
C
C
lcd3
lcd2
lcd1
(1/2) ⋅Vext
C
aux
V1 (V)
19-19
Vext
VgenOff = 0
VgenMode = 0
VgenRefEn = 0
with ZoomingADC™ and LCD driver
VGEN
1.2V v oltage
ref erence
(2/3) ⋅Vext
V2 (V)
2⋅Vext
(b)
Vext
LCD driv er
pad_v gen_v b
V3 (V)
2⋅Vext
pad_v gen_v 1
pad_v gen_v 3
Vext
pad_v gen_v 2
v oltage
Vext
(3/2)⋅Vext
pad_v gen_v a
V3 (V)
3⋅Vext
Vext
C
C
C
lcd3
lcd2
lcd1
C
aux
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