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参数资料
| 型号： | UPD780021AYGC-XXX-8BS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8.38 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 14 X 14 MM, PLASTIC, LQFP-64 |
| 文件页数： | 11/96页 |
| 文件大小： | 723K |
| 代理商： | UPD780021AYGC-XXX-8BS |
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PD780021A, 780022A, 780023A, 780024A, 780021AY, 780022AY, 780023AY, 780024AY
Data Sheet U14042EJ4V0DS
3.3 Pin I/O Circuits and Recommended Connection of Unused Pins
The I/O circuit type of each pin and recommended connection of unused pins are shown in Table 3-1.
For the I/O circuit configuration of each type, see Figure 3-1.
Table 3-1. Types of Pin I/O Circuits
Pin Name
I/O
Recommended Connection of Unused Pins
Circuit Type
P00/INTP0 to P02/INTP2
8-C
I/O
Input: Independently connect to VSS0 or VSS1 via a resistor.
P03/INTP3/ADTRG
Output: Leave open.
P10/ANI0 to P17/ANI7
25
Input
Connect directly to VDD0, VDD1, VSS0, or VSS1 via a resistor.
P20/S130
8-C
I/O
Input: Independently connect to VDD0, VDD1, VSS0, or VSS1 via
P21/SO30
5-H
a resistor.
P22/SCK30
8-C
Output: Leave open.
P23/RxD0
P24/TxD0
5-H
P25/ASCK0
8-C
P30, P31
13-Q
Input: Connect directly to VSS0 or VSS1.
P32, P33
13-S
Output: Leave open at low-level output.
(
PD780024A Subseries only)
P32/SDA0
13-R
(
PD780024AY Subseries only)
P33/SCL0
(
PD780024AY Subseries only)
P34/SI31Note
8-C
Input: Independently connect to VDD0, VDD1, VSS0, or VSS1 via
P35/SO31Note
5-H
a resistor.
P36/SCK31Note
8-C
Output: Leave open.
P40/AD0 to P47/AD7
5-H
Input: Independently connect to VDD0 or VDD1 via a resistor.
Output: Leave open.
P50/A8 to P57/A15
Input: Independently connect to VDD0, VDD1, VSS0, or VSS1 via
P64/RD
a resistor.
P65/WR
Output: Leave open.
P66/WAIT
P67/ASTB
P70/TI00/TO0
8-C
P71/TI01
P72/TI50/TO50
P73/TI51/TO51
P74/PCL
5-H
P75/BUZ
RESET
2
Input
—
XT1
16
Connect directly to VDD0 or VDD1.
XT2
—
Leave open.
AVDD
—
Connect to directly VDD0 or VDD1.
AVREF
Connect to directly VSS0 or VSS1.
AVSS
IC
Note
SI31, SO31, and SCK31 are incorporated only in the
PD780024A Subseries.
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