参数资料
型号: AT91SAM7S32B-AU-999
厂商: Atmel
文件页数: 88/165页
文件大小: 0K
描述: IC MCU ARM7 32KB FLASH 48LQFP
产品培训模块: MCU Product Line Introduction
标准包装: 2,000
系列: SAM7S
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 55MHz
连通性: I²C,SPI,SSC,UART/USART
外围设备: 欠压检测/复位,DMA,POR,PWM,WDT
输入/输出数: 21
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 8K x 8
电压 - 电源 (Vcc/Vdd): 1.65 V ~ 1.95 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 48-LQFP
包装: 带卷 (TR)
配用: AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9
AT91SAM7S-EK-ND - KIT EVAL FOR ARM AT91SAM7S
29
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
9.2
Clock Generator
The Clock Generator embeds one low-power RC Oscillator, one Main Oscillator and one PLL with the following
characteristics:
RC Oscillator ranges between 22 kHz and 42 kHz
Main Oscillator frequency ranges between 3 and 20 MHz
Main Oscillator can be bypassed
PLL output ranges between 80 and 220 MHz
It provides SLCK, MAINCK and PLLCK.
Figure 9-3.
Clock Generator Block Diagram
9.3
Power Management Controller
The Power Management Controller uses the Clock Generator outputs to provide:
the Processor Clock PCK
the Master Clock MCK
the USB Clock UDPCK (not present on SAM7S32/16)
all the peripheral clocks, independently controllable
three programmable clock outputs
The Master Clock (MCK) is programmable from a few hundred Hz to the maximum operating frequency of the device.
The Processor Clock (PCK) switches off when entering processor idle mode, thus allowing reduced power consumption
while waiting for an interrupt.
Embedded
RC
Oscillator
Main
Oscillator
PLL and
Divider
Clock Generator
Power
Management
Controller
XIN
XOUT
PLLRC
Slow Clock
SLCK
Main Clock
MAINCK
PLL Clock
PLLCK
Control
Status
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