XE8802MI035LF Semtech, XE8802MI035LF Datasheet - Page 49
XE8802MI035LF
Manufacturer Part Number
XE8802MI035LF
Description
IC DAS 16BIT FLASH 8K 100-LQFP
Manufacturer
Semtech
Datasheet
1.XE8802MI035LF.pdf
(193 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
XE8802MI035LF
Manufacturer:
TI
Quantity:
8 700
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7.1
3 available clock sources (RC oscillator, quartz oscillator and external clock).
•
•
7.2
The XE88LCxx chips can work on different clock sources (RC oscillator, quartz oscillator and external clock). The
clock generator block is in charge of distributing the necessary clock frequencies to the circuit.
Figure 7-1 represents the functionality of the clock block.
The internal RC oscillator or an external clock source can be selected to drive the high prescaler. This prescaler
generates frequency divisions down to 1/256 of its input frequency. A 32kHz clock is generated by enabling the
quartz oscillator (if present in the product) or by selecting the appropriate tap on the high prescaler. The low
prescaler generates clock signals from 32kHz down to 1Hz. The clock source for the CPU can be selected from the
RC oscillator, the external clock or the 32kHz clock.
7.3
© Semtech 2006
2 divider chains: high-prescaler (8 bits) and low-prescaler (15 bits).
CPU clock disabling in halt mode.
Features
Overview
Register map
7
6
5
4
3
2
1
0
7-2
1
0
7-1
0
pos.
pos.
pos.
CpuSel
-
EnExtClock
BiasRc
ColdXtal
-
EnableXtal
EnableRc
--
Output16k
OutputCpuCk
--
ClearLowPrescal
RegSysClock
RegSysMisc
RegSysPre0
r/w
r
r/w
r/w
r
r
r/w
r/w
r
r/w
r/w
r
w1
r0
rw
rw
rw
Table 7-1: RegSysClock register
Table 7-2: RegSysMisc register
Table 7-3: RegSysPre0 register
XE8802 Sensing Machine Data Acquisition MCU
0 nresetsleep
0
0 nresetcold
1 nresetcold
1 nresetsleep
0
0 nresetsleep
1 nresetsleep
000000
0000000
0
0 nresetsleep
0 nresetsleep
reset
reset
reset
7-2
with ZoomingADC™ and LCD driver
Select speed for cpuck
Unused
Enable for external clock
Enable Rcbias (reduces start-up time of RC).
Xtal in start phase
Unused
Enable Xtal oscillator
Enable RC oscillator
Unused
Output 16 kHz signal on PB[3]
Output CPU clock on PB[2]
Unused
Write 1 to reset low prescaler, but always
reads 0
function
function
function
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