参数资料
型号: DS1244W-120IND
厂商: Maxim Integrated Products
文件页数: 18/20页
文件大小: 0K
描述: IC NVSRAM 256KBIT 120NS 28DIP
标准包装: 12
类型: Phantom 计时芯片
特点: 闰年,NVSRAM
存储容量: 32KB
时间格式: HH:MM:SS:hh(12/24 小时)
数据格式: YY-MM-DD-dd
接口: 并联
电源电压: 2.97 V ~ 3.63 V
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 28-DIP 模块(0.600",15.24mm)
供应商设备封装: 28-EDIP
包装: 管件
DS1244/DS1244P
7 of 20
Figure 2. PHANTOM CLOCK REGISTER DEFINITION
AM/PM/12/24 MODE
Bit 7 of the hours register is defined as the 12-hour or 24-hour mode-select bit. When high, the 12-hour
mode is selected. In the 12-hour mode, bit 5 is the AM/PM bit with logic high being PM. In the 24-hour
mode, bit 5 is the 20-hour bit (20–23 hours).
OSCILLATOR AND RESET BITS
Bits 4 and 5 of the day register are used to control the RESET and oscillator functions. Bit 4 controls the
RESET
(pin 1). When the RESET bit is set to logic 1, the RESET input pin is ignored. When the RESET
bit is set to logic 0, a low input on the RESET pin will cause the phantom clock to abort data transfer
without changing data in the watch registers. Bit 5 controls the oscillator. When set to logic 1, the
oscillator is off. When set to logic 0, the oscillator turns on and the watch becomes operational. These
bits are shipped from the factory set to a logic 1.
ZERO BITS
Registers 1, 2, 3, 4, 5, and 6 contain one or more bits that always read logic 0. When writing these
locations, either a logic 1 or 0 is acceptable.
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