参数资料
型号: uPSD3212
厂商: 意法半导体
英文描述: Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可编程系统器件)
中文描述: 闪存可编程系统器件与8032微控制器内核(嵌入高速“8032微控制器核”的闪存型可编程系统器件)
文件页数: 47/155页
文件大小: 1055K
代理商: UPSD3212
47/155
μPSD321X
OSCILLATOR
The oscillator circuit of the μPSD321X Devices is
a single stage inverting amplifier in a Pierce oscil-
lator configuration. The circuitry between XTAL1
and XTAL2 is basically an inverter biased to the
transfer point. Either a crystal or ceramic resonator
can be used as the feedback element to complete
the oscillator circuit. Both are operated in parallel
resonance.
XTAL1 is the high gain amplifier input, and XTAL2
is the output. To drive the μPSD321X Devices ex-
ternally, XTAL1 is driven from an external source
and XTAL2 left open-circuit.
Figure 19. Oscillator
SUPERVISORY
There are four ways to invoke a reset and initialize
the μPSD321X Devices.
I
Via the external RESET pin
I
Via the internal LVR Block.
I
Via Watch Dog timer
The RESET mechanism is illustrated in Figure 20.
Figure 20. RESET Configuration
AI06620
XTAL1
XTAL2
8 to 40 MHz
XTAL1
XTAL2
External Clock
AI07429
Reset
CPU
&
PERI.
Noise
Cancel
LVR
S
Q
R
CPU
Clock
Sync
10ms
Timer
WDT
PSD_RST
Active Low
10ms at 40Mhz
50ms at 8Mhz
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