参数资料
型号: ST72621L4T1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
封装: TQFP-44
文件页数: 24/134页
文件大小: 815K
代理商: ST72621L4T1
ST7262
12/134
2.1 PCB LAYOUT RECOMMENDATION
In the case of DIP20 devices the user should lay-
out the PCB so that the DIP20 ST7262 device and
the USB connector are centered on the same axis
ensuring that the D- and D+ lines are of equal
length. Refer to Figure 6
Figure 6. Recommended PCB Layout for USB Interface with DIP20 package
43
4
-
PD3
I/O CT
xx
Port D3
44
5
-
PD2
I/O CT
xx
Port D2
Pin n
°
Pin Name
Type
Level
Port / Control
Main
Function
(after
reset)
Alternate Function
TQFP44
DIP42
SO34
DIP32
SO20
DIP20
Input
Output
Input
Outp ut
float
wpu
int
ana
OD
PP
14
13
12
11
15
16
17
18
USBVCC
USBDP
1
2
3
4
5
6
7
8
9
10
19
20
USBDM
USB Connector
Ground
ST7262
1.5KOhm pull-up resistor
1
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