参数资料
型号: MC68HC705CT4FN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.048 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 138/152页
文件大小: 668K
代理商: MC68HC705CT4FN
NON-DISCLOSURE
AGREEMENT
REQUIRED
Dual Phase-Locked Loop (PLL)
General Release Specification
MC68HC705CT4 Rev. 2.0
86
Dual Phase-Locked Loop (PLL)
MOTOROLA
11.2 Introduction
This dual PLL is similar to that of the MC145162 60-MHz universal
programmable dual PLL frequency synthesizer. It is especially designed
for CT-1 cordless phone applications.
The PLL features fully programmable 16-bit receive, 16-bit transmit, and
12-bit reference ripple down counters. It also has two independent
phase detectors for transmit and receive loops.
The FinTx and FinRx signals are input to the PLL transmit and receive
counters, respectively. They are typically driven by the loop VCO and
AC-coupled. The minimum input signal level is 200 mVp-p @ 60.0 MHz.
Figure 11-1. Dual PLL Block Diagram
OSC
12-BIT PROGRAMMABLE
REFERENCE COUNTER
÷ 4
÷ 5
TxPDOUT
RxPDOUT
16-BIT PROGRAMMABLE
TX COUNTER
16-BIT PROGRAMMABLE
RX COUNTER
FinT
FinR
PLS1
PLS0
MCU BUS
(10.24 MHz)
÷ 25
TX
PHASE
DETECTOR
RX
PHASE
DETECTOR
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