參數(shù)資料
型號: UPD754244GS-XXX-GJG
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20
封裝: 0.300 INCH, 0.65 MM PITCH, PLASTIC, SSOP-20
文件頁數(shù): 22/90頁
文件大小: 602K
代理商: UPD754244GS-XXX-GJG
PD754144, 754244
27
Data Sheet U10040EJ2V1DS
7.5 Programmable Threshold Port (Analog Input Port)
The
PD754244 provides analog input pins (PTH00, PTH01) whose threshold voltage (reference voltage) is
selectable within sixteen steps. The following operations can be performed with these analog input pins.
(1)
Comparator operation
(2)
4-bit resolution A/D converter operation (controlled by software)
Caution
Do not specify an on-chip pull-up resistor connection for Port 6 when using the programmable
threshold port.
Figure 7-7. Programmable Threshold Port Block Diagram
PTH00
PTH01
AVREF
1
2
R
1
2
R
MPX
VREF
PTHM7
PTHM
PTHM6
PTHM5
PTHM4
PTHM3
PTHM2
PTHM1
PTHM0
8
Operate/stop
Standby mode signal
+
+
PTH0
Programmable
threshold
port input latch (2)
Input buffer
Internal
bus
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