参数资料
型号: ADUC848BSZ8-3
厂商: Analog Devices Inc
文件页数: 79/108页
文件大小: 0K
描述: IC MCU FLASH W/16BIT ADC 52MQFP
标准包装: 96
系列: MicroConverter® ADuC8xx
核心处理器: 8052
芯体尺寸: 8-位
速度: 12.58MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PSM,PWM,温度传感器,WDT
输入/输出数: 34
程序存储器容量: 8KB(8K x 8)
程序存储器类型: 闪存
EEPROM 大小: 4K x 8
RAM 容量: 2.25K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
数据转换器: A/D 10x16b; D/A 1x12b,2x16b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 52-QFP
包装: 托盘
ADuC845/ADuC847/ADuC848
Data Sheet
Rev. C | Page 72 of 108
INTVAL—User Timer Interval Select Register
Function:
User code writes the required time interval to this register. When the 8-bit interval counter is equal to the time interval
value loaded in the INTVAL SFR, the TII bit (TIMECON.2) is set and generates an interrupt, if enabled.
SFR Address:
A6H
Power-On Default:
00H
Bit Addressable:
No
Valid Value:
0 to 255 decimal
HTHSEC—Hundredths of Seconds Time Register
Function:
This register is incremented in 1/128-second intervals once TCEN in TIMECON is active. The HTHSEC SFR counts
from 0 to 127 before rolling over to increment the SEC time register.
SFR Address:
A2H
Power-On Default:
00H
Bit Addressable:
No
Valid Value:
0 to 127 decimal
SEC—Seconds Time Register
Function:
This register is incremented in 1-second intervals once TCEN in TIMECON is active. The SEC SFR counts from 0 to 59
before rolling over to increment the MIN time register.
SFR Address:
A3H
Power-On Default:
00H
Bit Addressable:
No
Valid Value:
0 to 59 decimal
MIN—Minutes Time Register
Function
This register is incremented in 1-minute intervals once TCEN in TIMECON is active. The MIN SFR counts from 0 to 59
before rolling over to increment the HOUR time register.
SFR Address:
A4H
Power-On Default:
00H
Bit Addressable:
No
Valid Value:
0 to 59 decimal
HOUR—Hours Time Register
Function:
This register is incremented in 1-hour intervals once TCEN in TIMECON is active. The HOUR SFR counts from 0 to 23
before rolling over to 0.
SFR Address:
A5H
Power-On Default:
00H
Bit Addressable:
No
Valid Value:
0 to 23 decimal
To enable the TIC as a real-time clock, the HOUR, MIN, SEC, and HTHSEC registers can be loaded with the current time. Once the
TCEN bit is high, the TIC starts. To use the TIC as a time interval counter, select the count interval—hundredths of seconds, seconds,
minutes, and hours via the ITS0 and ITS1 bits in the TIMECON SFR. Load the count required into the INTVAL SFR.
Note that INTVAL is only an 8-bit register, so user software must take into account any intervals longer than are possible with 8 bits.
Therefore, to count an interval of 20 seconds, use the following procedure:
MOV TIMECON, #0D0H ;Enable 24Hour mode, count seconds, Clear TCEN.
MOV INTVAL,
#14H
;Load INTVAL with required count interval...in this case 14H = 20
MOV TIMECON, #0D3H ;Start TIC counting and enable the 8bit INTVAL counter.
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