參數(shù)資料
型號(hào)： μPDPD30101
廠商： NEC Corp.
英文描述： 64-Bit Micro[rocessor(64位微處理器)
中文描述： 64位微[rocessor（64位微處理器）
文件頁(yè)數(shù)： 49/97頁(yè)
文件大?。?/td> 409K
代理商： ΜPDPD30101
μ
PD30101
48
11. RTC (REAL-TIME CLOCK UNIT)
11.1 General
The RTC consists of the following three types of timers.
RTCLong timer
This is a 24-bit programmable down counter that counts down at a cycle of 32.768 kHz. It can generate an
interrupt request at intervals of up to 512 seconds.
ElapsedTime timer
This is a 48-bit up counter that counts up at a cycle of 32.768 kHz. When this counter counts up to about 272
years, it returns to 0. This counter consists of an 48-bit ElapsedTime counter and a 48-bit alarm time register.
By comparing these, an interrupt request can be generated at specific time.
TClock count timer
This is a 32-bit free-running counter that counts up at a cycle of TClock, and can be used for performance
evaluation.
Table 11-1. RTC Registers
Symbol
Function
ETIMELREG
ElapsedTime timer register, low
ETIMEMREG
ElapsedTime timer register, middle
ETIMEHREG
ElapsedTime timer register, high
ECMPHREG
ElapsedTime timer compare register, high
ECMPLREG
ElapsedTime timer compare register, low
ECMPMREG
ElapsedTime timer compare register, middle
RTCLLREG
RTCLong timer register, low
RTCLHREG
RTCLong timer register, high
RTCLCNTLREG
RTCLong timer count register, low
RTCLCNTHREG
RTCLong timer count register, high
TCLKCNTLREG
TCLK count register, low
TCLKCNTHREG
TCLK count register, high
RTCINTREG
RTC interrupt register
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