參數(shù)資料
型號(hào)： LA17000M
廠商： Sanyo Electric Co.,Ltd.
英文描述： Tuner System IC with Built-in PLL for Car Audio Applications
中文描述： 調(diào)諧器集成電路與系統(tǒng)專為汽車音響應(yīng)用的鎖相環(huán)
文件頁(yè)數(shù)： 21/54頁(yè)
文件大小： 830K
代理商： LA17000M
LA17000M
No. 6522-21/54
Continued from preceding page.
No.
Control block/Data
General-purpose counter
control data
Description
Related data
This data sets the general-purpose counter input pin (HCTR).
General-purpose counter measurement start data
CTE = 1: Count start
= 0: Count reset
This data determines the measurement time (frequency mode) and number of
periods (period mode) for the general-purpose counter.
CTP = 0: When a count reset is executed (CTE = 0), the general-purpose
counter input is pulled down.
= 1: When a count reset is executed (CTE = 0), the general-purpose
counter input is not pulled down, and the wait time is reduced.
However, immediately after CTP = 1 is set, the start of the count
must wait until the general purpose counter input pin is biased.
The input sensitivity is reduced when CTC = 1. (Sensitivity: 10 to 30 mVrms)
I/O port control data
This data specifies whether an I/O port is an input port or an output port.
“
data
”
= 0: Input port
= 1: Output port
I/O-1 to I/0-2
* During a power-on reset, I/O-0 and I/O-2 become input ports.
STSD SW becomes an output port.
This data determines the status of the SEEK SW pin.
“
data
”
= 0: 2.5[V] output
* This pin is open and the midpoint bias is output by an external circuit.
“
data
”
= 1: 0[V] or 5[V] output
* Determined by the OUT0 data.
AM/FM SD, FM-ST IND output dual-purpose pin
“
data
”
= 0: Fixed
= 1: Prohibited
This data determines the output on output ports O-0 through O-3.
“
data
”
= 1: Open or Hi
= 0: Low
* Invalid if specified as an input port or unlocked output.
This data converts the general-purpose counter pin to an input port.
HCTR = 0: Prohibited
= 1: HCTR (general-purpose counter)
SEEK SW
SDST SW
Output port data
OUT0 to OUT2
Continued on next page.
CTS1
Measurement time
Measurement mode
1
0
HCTR
—
Frequency
Not measured
HCTR
(6)
Frequency measurement mode
Measurement Wait time (ms)
time (ms)
CTP = 0
4
8
32
64
Period
GT1
GT0
measurement
mode
1 period
1 period
2 periods
2 periods
CTP = 1
1 to 2
1 to 2
1 to 2
1 to 2
0
0
1
1
0
1
0
1
3 to 4
3 to 4
7 to 8
7 to 8
OUT0 to OUT3
ULD
I/O-0 to I/O-3
ULD
I/O-0 to I/O-3
ULD
I/O-0 to I/O-3
ULD
CTS1
(7)
(8)
(9)
(10)
(11)
CTS0, CTS1
CTE
GT0, GT1
CTP
CTC
General-purpose counter
input control data
HCTR
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