XE8805 SEMTECH [Semtech Corporation], XE8805 Datasheet - Page 8

• Manufacturer Part Number: XE8805
• Description: Data Acquisition MCU
• Manufacturer: SEMTECH [Semtech Corporation]

Table 1-1. Bonding plan of the LQFP-64 package (LQFP 64L 10x10mm thick 1.6 mm)
1.3 Pin assignment
The table below gives a short description of the different pin assignments.
Pin
VBAT
VSS VSS_REG
VREG
VPP/TEST
RESET
OSCIN/OSCOUT
PA(7:0)
PB(7:0)
PC(7:0)
AC_A(7:0)
AC_R(3:0)
VMULT
DAB_OUT
DAB_R_x
DAB_Ax_y
DAS_OUT
DAS_AI_x
DAS_AO
Table 1-2. Pin assignment
Table 1-3 gives a more detailed pin map for the different pins. It also indicates the possible I/O configuration of
these pins. The indications in blue bold are the configuration at start-up.
The pins CNTx pins are possible counter inputs, PWMx are possible PWM outputs.
© Semtech 2006
Package pin
21
22
23
24
25
26
27
28
29
30
31
32
DAB_AO_M
DAB_AO_P
DAB_AI_M
Assignment
Positive power supply
Negative power supply
Connection for the mandatory external capacitor of the voltage regulator
High voltage supply for flash memory programming (NC in ROM versions)
Resets the circuit when the voltage is high
Quartz crystal connections, also used for flash memory programming
Parallel input port A pins
Parallel I/O port B pins
Parallel I/O port C pins
Acquisition chain input pins
Acquisition chain reference pins
Connection for the external capacitor if VBAT is below 3V
Bias D/A output
Bias D/A reference (x=P: plus, x=M: minus)
Bias D/A amplifier IO (x=I: input, x=O: output ; y=P: plus, y=M: minus)
Signal D/A output
Signal D/A amplifier inputs (x=P: plus, x=M: minus)
Signal D/A amplifier output
DAB_R_M
DAB_OUT
DAB_AI_P
DAB_R_P
name
PB(4)
PB(5)
PB(6)
PB(7)
NC
Package pin
53
54
55
56
57
58
59
60
61
62
63
64
1-6
DAS_AI_M
VSS_REG
OSCOUT
DAS_AO
VMULT
RESET
OSCIN
VREG
name
VBAT
VSS
NC
NC
XE8805/05A
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