参数资料
型号: MC68HC705SR3CPE
厂商: Freescale Semiconductor
文件页数: 46/96页
文件大小: 0K
描述: IC MCU 3.75K 2.1MHZ OTP 40-DIP
标准包装: 9
系列: HC05
核心处理器: HC05
芯体尺寸: 8-位
速度: 4MHz
外围设备: LED,POR
输入/输出数: 32
程序存储器容量: 3.75KB(3.75K x 8)
程序存储器类型: OTP
RAM 容量: 192 x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 4x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
Freescale
6-4
MC68HC05SR3
TIMER
6
PR2:PR0
These three bits enable the program to select the division ratio of the prescaler. On reset, these
three bits are set to “100”, which corresponds to a division ratio of 16.
6.3
Timer Data Register (TDR)
The TDR is a read/write register which contains the current value of the 8-bit count-down timer
counter when read. Reading this register does not disturb the counter operation.
6.4
Operation during Low Power Modes
The timer ceases counting in STOP mode. When STOP mode is exited by an external interrupt
(IRQ or IRQ2), the internal oscillator will resume its operation, followed by internal processor
stabilization delay. The timer is then cleared to zero and resumes its operation. The TIF bit in the
TCR will be set. To avoid generating a timer interrupt when exiting STOP mode, it is recommended
to set the TIM bit prior entering STOP mode. After exiting STOP mode TIF bit can then be cleared.
The CPU clock halts during the WAIT mode, but the timer remains active. If the interrupts are
enabled, the timer interrupt will cause the processor to exit the WAIT mode.
PR2
PR1
PR0
Divide Ratio
00
0
1
00
1
2
01
0
4
01
1
8
10
0
16
10
1
32
11
0
64
11
1
128
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$08
TD7
TD6
TD5
TD4
TD3
TD2
TD1
TD0
1111 1111
TPG
48
05SR3.Book Page 4 Thursday, August 4, 2005 1:08 PM
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MC68HC705SR3CPE 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC
MC68HC705SR3PE 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-DIP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,SPI,UART/USART 外围设备:欠压检测/复位,POR,PWM,WDT 输入/输出数:32 程序存储器容量:32KB(16K x 16) 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT
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