參數(shù)資料
型號: S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 134/161頁
文件大?。?/td> 1037K
代理商: S1C621A0F0A0100
S1C621A0 TECHNICAL HARDWARE
EPSON
I-49
CHAPTER 3: PERIPHERAL CIRCUITS (AMP and SVD)
AMP
(MOS input analog
comparator)
As shown in Figure 3.10.1, the MOS input general-purpose
analog comparator contained in the S1C621A0 has three
pins: two inputs (inverted: AMPM, non-inverted: AMPP) and
one output pin (AOUT).
OPON
This register (OPON) controls analog comparator power
circuit ON/OFF to save power. It is assigned to 0FFH, D2
of the memory space. Writing 1 to the register turns ON
the AMP circuit, and writing 0 turns OFF the circuit. At
initial reset, the register is set to 0. Data can be written to
or read from the register. A waiting time of at least 2 ms
is required for the AMP circuit to become stable after its
power is turned ON. The comparator response time (
tdA)
depend on difference of input voltage between AMPP and
AMPM. Then it is necessary to wait mode time to defect
small signal difference than electrical characteristics
condition on
tdA.
for example:
tdA (max.) = 5 ms at VAMPM = VAMPP ± 5 mV 25°C
OPDT
When the AMP circuit is used in such a way that the
comparator output takes binary form (0 or 1 only), the
data can be read by software. The data (read-only) is
assigned to 0FFH, D3 of the memory space.
With the AMP circuit OFF (OPON = 0), AOUT goes to 1
and the read data (OPDT) also goes to 1.
Fig. 3.10.1
AMP Circuit Block Diagram
AMPP
V DD
V SS
OPON
OPDT
Input
control
Power
control
Data bus (D3)
AMPM
AOUT
Address (FFH)
Data bus (D2)
Address (FFH)
S1C621A0
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