参数资料
型号: XRM48L950ZWTT
厂商: Texas Instruments
文件页数: 139/176页
文件大小: 0K
描述: MCU 16/32Bit FLASH 3MB 337NFBGA
标准包装: 1
系列: Hercules™ ARM® RM4x
应用: 工业安全,医疗
核心处理器: ARM? Cortex? - R4F
程序存储器类型: 闪存(3MB)
控制器系列: RM4
RAM 容量: 256K x 8
接口: CAN,以太网,I²C,LIN,MibSPI,SCI,SPI,USB
输入/输出数: 120
电源电压: 1.14 V ~ 3.6 V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 337-LFBGA
包装: 托盘
供应商设备封装: 337-NFBGA(16x16)
其它名称: 296-29390
BIAS_EN
Low
Power
Oscillator
LFEN
LF_TRIM
HFEN
HF_TRIM
CLK80K
CLK10M
CLK10M_VALID
nPORRST
SPNS174A – APRIL 2012 – REVISED SEPTEMBER 2013
4.6.1.2
Low Power Oscillator
The Low Power Oscillator (LPO) is comprised of two oscillators — HF LPO and LF LPO, in a single
macro.
4.6.1.2.1 Features
The main features of the LPO are:
Supplies a clock at extremely low power for power-saving modes. This is connected as clock source #
4 of the Global Clock Module.
Supplies a high-frequency clock for non-timing-critical systems. This is connected as clock source # 5
of the Global Clock Module.
Provides a comparison clock for the crystal oscillator failure detection circuit.
Figure 4-5. LPO Block Diagram
Figure 4-5 shows a block diagram of the internal reference oscillator. This is a low power oscillator (LPO)
and provides two clock sources: one nominally 80KHz and one nominally 10MHz.
4.6.1.2.2 LPO Electrical and Timing Specifications
Table 4-10. LPO Specifications
Parameter
MIN
Typical
MAX
Unit
Clock Detection
oscillator fail frequency - lower threshold, using
1.375
2.4
4.875
MHz
untrimmed LPO output
oscillator fail frequency - higher threshold, using
22
38.4
78
MHz
untrimmed LPO output
LPO - HF oscillator
untrimmed frequency
5.5
9
19.5
MHz
(fHFLPO)
trimmed frequency
8
9.6
11
MHz
startup time from STANDBY (LPO BIAS_EN High for
10
s
at least 900s)
cold startup time
900
s
LPO - LF oscillator
untrimmed frequency
36
85
180
kHz
startup time from STANDBY (LPO BIAS_EN High for
100
s
at least 900s)
cold startup time
2000
s
Copyright 2012–2013, Texas Instruments Incorporated
System Information and Electrical Specifications
65
Product Folder Links: RM48L950 RM48L750 RM48L550
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