參數(shù)資料
型號： SST89V54RD2-33-C-TQJE
廠商： Microchip Technology
文件頁數(shù)： 50/92頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 24KB FLASH 44TQFP
標(biāo)準(zhǔn)包裝： 160
系列： FlashFlex®
核心處理器： 8051
芯體尺寸： 8-位
速度： 33MHz
連通性： EBI/EMI，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，WDT
輸入/輸出數(shù)： 36
程序存儲器容量： 16KB（16K x 8）
程序存儲器類型： 閃存
EEPROM 大小： 8K x 8
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 3.6 V
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 44-TQFP
包裝： 托盤
2011 Silicon Storage Technology, Inc.
DS25087A
10/11
54
FlashFlex MCU
SST89V54RD2/RD / SST89V58RD2/RD
Not Recommended for New Designs
A Microchip Technology Company
Programmable Counter Array
The Programmable Counter Array (PCA) present on the SST89V5xRD2/RD is a special 16-bit timer
that has five 16-bit capture/compare modules. Each of the modules can be programmed to operate in
one of four modes: rising and/or falling edge capture, software timer, high-speed output, or pulse width
modulator. The 5th module can be programmed as a Watchdog Timer in addition to the other four
modes. Each module has a pin associated with it in port 1. Module 0 is connected to P1.3 (CEX0),
module 1 to P1[4] (CEX1), module 2 to P1[5] (CEX2), module 3 to P1[6] (CEX3), and module 4 to
P1[7] (CEX4). PCA configuration is shown in Figure 24.
PCA Overview
PCA provides more timing capabilities with less CPU intervention than the standard timer/counter. Its
advantages include reduced software overhead and improved accuracy.
The PCA consists of a dedicated timer/counter which serves as the time base for an array of five com-
pare/capture modules. Figure 24 shows a block diagram of the PCA. External events associated with
modules are shared with corresponding Port 1 pins. Modules not using the port pins can still be used
for standard I/O.
Each of the five modules can be programmed in any of the following modes:
Rising and/or falling edge capture
Software timer
High speed output
Watchdog Timer (Module 4 only)
Pulse Width Modulator (PWM)
PCA Timer/Counter
The PCA timer is a free-running 16-bit timer consisting of registers CH and CL (the high and low bytes
of the count values). The PCA timer is common time base for all five modules and can be programmed
to run at: 1/6 the oscillator frequency, 1/2 the oscillator frequency, Timer 0 overflow, or the input on the
ECI pin (P1.2). The timer/counter source is determined from the CPS1 and CPS0 bits in the CMOD
SFR as follows (see “PCA Timer/Counter Mode Register (CMOD)” on page 27):
Table 17: PCA Timer/Counter Source
CPS1
CPS0
12 Clock Mode
6 Clock Mode
00
fOSC /12
fOSC /6
01
fOSC /4
fOSC /2
1
0
Timer 0 overflow
1
External clock at ECI pin
(maximum rate = fOSC /8)
External clock at ECI pin
(maximum rate = fOSC /4)
T0-0.0 25087
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SST89V54RD2-33-C-TQJ-E 功能描述:8位微控制器 -MCU 24K(16Kx8K) 33nS RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
SST89V54RD2-33-C-TQJE1 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-33-C-TQJF2 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-33-I-NI 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-33-I-NIE1 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
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