參數(shù)資料
型號: SPC563M64L5COAY
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 80 MHz, MICROCONTROLLER, PQFP144
封裝: 20 X 20 MM, LEAD FREE, LQFP-144
文件頁數(shù): 123/140頁
文件大小: 1310K
代理商: SPC563M64L5COAY
Electrical characteristics
SPC563M64
Doc ID 14642 Rev 6
3.7
Power up/down sequencing
There is no power sequencing required among power sources during power up and power
down, in order to operate within specification but use of the following sequence is strongly
recommended when the internal regulator is bypassed:
5V
→ 3.3 V and 1.2 V
This is also the normal sequence when the internal regulator is enabled.
Although there are no power up/down sequencing requirements to prevent issues like latch-
up, excessive current spikes, etc., the state of the I/O pins during power up/down varies
according to table Table 19 for all pins with fast pads (pad_fc), and Table 20 for all pins with
medium (pad_msr_hv), slow (pad_ssr_hv) and multi-voltage (pad_multv_hv) pads.
Table 19.
Power sequence pin states for fast pads
VDDE
VRC33
VDD
Fast (pad_fc)
LOW
X
LOW
VDDE
LOW
X
HIGH
VDDE
VRC33
LOW
HIGH IMPEDANCE
VDDE
VRC33
VDD
FUNCTIONAL
Table 20.
Power sequence pin states for medium, slow and multi-voltage pads
VDDEH
VDD
Medium (pad_msr_hv)
Slow (pad_ssr_hv)
Multi-voltage (pad_multv_hv)
LOW
X
LOW
VDDEH
LOW
HIGH IMPEDANCE
VDDEH
VDD
FUNCTIONAL
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相關代理商/技術參數(shù)
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