參數(shù)資料
型號(hào): XE8801AMI027LF
廠商: Semtech
文件頁(yè)數(shù): 96/135頁(yè)
文件大小: 0K
描述: IC DAS 16BIT FLASH 8K MTP 44LQFP
標(biāo)準(zhǔn)包裝: 800
系列: XE880x
應(yīng)用: 感測(cè)機(jī)
核心處理器: Coolrisc816?
程序存儲(chǔ)器類型: 閃存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 44-VFQFN 裸露焊盤
包裝: 托盤
供應(yīng)商設(shè)備封裝: 44-MLPQ(7x7)
產(chǎn)品目錄頁(yè)面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
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Semtech 2005
www.semtech.com
11-5
XE8801A – SX8801R
Port A as an event source:
The interrupt signals of the pins PA[0] and PA[1] are also available as events on the event controller.
PortA as a clock source (product dependent):
Images of the PA[0] to PA[3] input ports (debounced or not) are available as clock sources for the
counter/timer/PWM peripheral (see the counter block documentation for more information).
Port A as a reset source:
Port A can be used to generate a system reset by placing a predetermined word on Port A externally. The reset is
built using a logical and of the 8 PARes[x] signals:
resetfromportA = PAReset[7] AND PAReset[6] AND PAReset[5] AND ... AND PAReset[0]
PAReset[x] is itself a logical function of the corresponding pin PA[x]. One of four logical functions can be selected
for each pin by writing into two registers RegPARes0 and RegPARes1 as shown in Table 11-8.
PARes1[x]
PARes0[x]
PAReset[x]
0
1
PA[x]
1
0
not(PA[x])
1
Table 11-8: Selection bits for reset signal
A reset from Port A can be inhibited by placing a 0 on both PARes1[x] and PARes0[x] for at least 1 pin. Setting
both PARes1[x] and PARes0[x] to 1, makes the reset independent of the value on the corresponding pin. Setting
both registers to hFF, will reset the circuit independent from the Port A input value. This makes it possible to do a
reset by software.
Note: depending of the value of PA[0] to PA[7], the change of RegPARes0 and RegPARes1 can cause a reset.
Therefore it is safe to have always one (RegPARes0[x], RegPARes1[x]) equal to ‘00’ during the setting operations.
Port A as a RC enable:
PA[0] can be used to enable the RC oscillator. When RCOnPA0 bit in RegSysMisc is set to 1 and the value of
PA[0] (debounced or not) is equal to 1, the EnRc bit in RegSysClock is automatically set to 1.
11.6 Port A electrical specification
Sym
description
min
typ
max
unit
Comments
VINH
Input high voltage
0.7*VBAT
VBAT
V
VBAT
≥2.4V
VINL
Input low voltage
VSS
0.2*VBAT
V
VBAT
≥2.4V
RPU
Pull-up resistance
20
50
80
k
Cin
Input capacitance
3.5
pF
Note 1
Note 1: this value is indicative only since it depends on the package.
Table 11-9. Port A electrical specification.
Not
Recommended
for
New
Designs
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