参数资料
型号: RTPXA270C0C312
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 312 MHz, RISC PROCESSOR, PBGA356
封装: 13 X 13 MM, 1 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, VFBGA-356
文件页数: 92/128页
文件大小: 1560K
代理商: RTPXA270C0C312
6-2
Electrical, Mechanical, and Thermal Specification
Intel PXA270 Processor
AC Timing Specifications
6.2
Reset and Power Manager Timing Specifications
The processor asserts the nRESET_OUT pin in one of several different modes:
Power-on reset
Hardware reset
Watchdog reset
GPIO reset
Sleep mode
Deep-sleep mode
The following sections give the timing and specifications for entry into and exit from these modes.
6.2.1
Power-On Timing Specifications
Power-on reset begins when a power supply is detected on the backup battery pin, VCC_BATT,
after the processor has been powered off. A power-on reset is equivalent to a hardware reset, in that
all units are reset to the same known state as with a hardware reset. A power-on reset is a complete
and total reset that occurs only at initial power on.
The external power-supply system must enable the power supplies for the processor in a specific
sequence to ensure proper operation. Figure 6-2 shows the timing diagram for a power-on reset
sequence. Table 6-2 details the timing.
The sequence for power-on reset is as follows:
1. VCC_BATT is established, then nRESET should be de-asserted to initiate power-on reset.
2. PWR_OUT is asserted. The processor asserts nRESET_OUT.
3. The external power-control subsystem de-asserts nBATT_FAULT to signal that the main
battery is connected and not discharged.
4. The processor asserts the SYS_EN signal to enable the power supplies VCC_IO, VCC_MEM,
VCC_BB, VCC_USB, and VCC_LCD. VCC_USIM can be established at this time also but
can be independently controlled through its own control signals. VCC_IO must be established
first. The other supplies can turn on in any order, but they must all be established within
125 milliseconds of the assertion of SYS_EN.
Figure 6-1. AC Test Load
I/O
50pf
ΖΟ = 50
相关PDF资料
PDF描述
RCPXA270C0C520 520 MHz, MICROPROCESSOR, PBGA356
RV5C387A-F 0 TIMER(S), REAL TIME CLOCK, PDSO10
RX-4571LC REAL TIME CLOCK, PDSO12
RX-4571SA REAL TIME CLOCK, PDSO14
RX-4571SA 0 TIMER(S), REAL TIME CLOCK, PDSO14
相关代理商/技术参数
参数描述
RTPXA270C0C416 制造商:Intel 功能描述:MPU PXA270 416MHz 3V/3.3V 356-Pin VFBGA
RTPXA270C0C624 制造商:Intel 功能描述:MPU PXA270 624MHz 3V/3.3V 356-Pin VFBGA
RTPXA270C5C208 S L977 制造商:Marvell 功能描述:Marvell RTPXA270C5C208 S L977 Microprocessors
RTPXA270C5C312 功能描述:IC MPU 32BIT 312MHZ 356-PBGA RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微处理器 系列:- 标准包装:1 系列:MPC85xx 处理器类型:32-位 MPC85xx PowerQUICC III 特点:- 速度:1.2GHz 电压:1.1V 安装类型:表面贴装 封装/外壳:783-BBGA,FCBGA 供应商设备封装:783-FCPBGA(29x29) 包装:托盘
RTPXA270C5C312 868403 制造商:Marvell 功能描述: