參數(shù)資料
型號: μPD789800
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 12/48頁
文件大?。?/td> 266K
代理商: ΜPD789800
12
μ
PD789800
3.3
Pin Input/Output Circuits and Handling of Unused Pins
Table 3-1 lists the types of input/output circuits for each pin and explains how unused pins are handled.
Figure 3-1 shows the configuration of each type of input/output circuit.
Table 3-1. Type of Input/Output Circuit for Each Pin
Pin name
I/O circuit type
I/O
Recommended connection of unused pins
P00-P07
P10-P17
5-R
P20/
SCK10
P21/SO10
P22/SI10
P23, P24
8-C
P25
P26/INTP0/TI01/TO01
8-F
P40/
KR00
-P47/
KR07
8-C
Input
: Connect these pins separately to V
DD0
, V
DD1
, V
SS0
, or V
SS1
via
respective resistors.
Output : Leave these pins open.
USBDM
Connect this pin to the REGC pin.
USBDP
24-A
I/O
Connect this pin to V
SS0
or V
SS1
via resistors.
RESET
2
Input
-
IC
-
-
Connect this pin directly to V
SS0
or V
SS1
.
NC
-
-
Leave this pin open.
REGC
-
-
Connect this pin to the USBDM pin.
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