Toshiba TC9349AFG Manual page 103

Phase Comparator and Lock Detection port
The phase comparator compares the reference frequency supplied from the reference frequency divider and the
programmable counter divided frequency output to determine the phase difference and outputs errors. It then controls the
voltage control oscillator (VCO) through the low-pass filter to match the frequency and phase difference of these two
signals.
There are two pins available for the phase comparator, each including individually adjustable output resistance. This
resistance can be set to three types, namely 5, 50 and 100 k Ω . It also includes automatic switching by detection of the phase
difference, the N-channel transistor for an LFP amplifier that withstands 5.5 V and the external charge pump output mode.
The phase comparator and the charge pump output use the DC-DC converter power supply (V
Note that the phase comparator output pins (DO1/2) can be used as general-purpose output ports by using the DO control
port.
1. Phase Comparator (DO) Control Port and Unlock Detection Port
DO1 control
DO1コントロール
Y1 Y2
φL24
R0 R1
DO2 control 1
DO コントロール ２
Y1 Y2
φL25
R0 R1
DO2 control 2
DO コントロール ２
Y1 Y2
φL26
AUTO ENA
Y4 Y8
M0 M1
DO1/DO2 output resistance setting
１
Y4 Y8
M0 M1
２
Y4 Y8
Selection of DO2 output resistance phase
DO2出力抵抗の位相差検出クロックの選択
difference detection clock
CK0 CK1
Permission of phase difference
位相差検出動作の許可
detection
DO2 output resistance automatic
DO2出力抵抗自動切り替え制御
switching control
103
DO1/DO2 output state setting DO1/DO2出力状態の設定
M1 M0 Output state 出力状態
0 0 Phase comparator output 位相比較器出力
"L" level output
0 1 "L"レベル出力
OT
1 0 OT出力 "H" レベル出力 "H" level output
output
1 1 ハイインピーダンス High impedance
DO1/DO2出力抵抗設定
DO output resistance
R1 R0 DO出力抵抗
0 0 0Ω
0 1 5kΩ
1 0 50kΩ
1 1 100kΩ
Phase difference
CK1 CK0 位相差検出クロック(fd)
detection clock (fd)
0 0 OSCin/2
0 1 OSCin/4
1 0 OSCin/8
1 1 OSCin/16
0: Prohibition
1: Enabled
0: Prohibition
1: Enabled
TC9349AFG
× 2) for CPU.
: V
DB DD
： 0 禁止
： 1 許可
： 0 禁止
： 1 許可
2006-02-24