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参数资料
| 型号： | R5F56217BDLE#U0 |
| 厂商： | Renesas Electronics America |
| 文件页数： | 46/148页 |
| 文件大小： | 0K |
| 描述： | MCU 32BIT FLASH 384KROM 145TFLGA |
| 产品培训模块： | RX Compare Match Timer RX DMAC |
| 标准包装： | 1 |
| 系列： | RX600 |
| 核心处理器： | RX |
| 芯体尺寸： | 32-位 |
| 速度： | 100MHz |
| 连通性： | CAN，EBI/EMI，I²C，SCI，SPI，USB |
| 外围设备： | DMA，LVD，POR，PWM，WDT |
| 输入/输出数： | 103 |
| 程序存储器容量： | 384KB（384K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 64K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 3.6 V |
| 数据转换器： | A/D 8x10/12b，D/A 2x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 145-TFLGA |
| 包装： | 托盘 |
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PIC18F6520/8520/6620/8620/6720/8720
DS39609B-page 138
2004 Microchip Technology Inc.
12.3
Timer1 Interrupt
The TMR1 register pair (TMR1H:TMR1L) increments
from 0000h to FFFFh and rolls over to 0000h. The
TMR1 interrupt, if enabled, is generated on overflow,
which is
latched in interrupt
flag
bit, TMR1IF
(PIR1<0>). This interrupt can be enabled/disabled by
setting/clearing TMR1 Interrupt Enable bit, TMR1IE
(PIE1<0>).
12.4
Resetting Timer1 Using a CCP
Trigger Output
If the CCP module is configured in Compare mode
to
generate
a
“special
event
trigger”
(CCP1M3:CCP1M0 = 1011), this signal will reset
Timer1 and start an A/D conversion (if the A/D module
is enabled).
Timer1 must be configured for either Timer or Synchro-
nized Counter mode to take advantage of this feature.
If Timer1 is running in Asynchronous Counter mode,
this Reset operation may not work.
In the event that a write to Timer1 coincides with a
special event trigger from CCP1, the write will take
precedence.
In this mode of operation, the CCPR1H:CCPR1L
register pair effectively becomes the period register for
Timer1.
12.5
Timer1 16-Bit Read/Write Mode
Timer1 can be configured for 16-bit reads and writes
(see
When
the
RD16
control
bit
(T1CON<7>) is set, the address for TMR1H is mapped
to a buffer register for the high byte of Timer1. A read
from TMR1L will load the contents of the high byte of
Timer1 into the Timer1 high byte buffer. This provides
the user with the ability to accurately read all 16 bits of
Timer1 without having to determine whether a read of
the high byte, followed by a read of the low byte, is
valid, due to a rollover between reads.
A write to the high byte of Timer1 must also take place
through the TMR1H Buffer register. Timer1 high byte is
updated with the contents of TMR1H when a write
occurs to TMR1L. This allows a user to write all 16 bits
to both the high and low bytes of Timer1 at once.
The high byte of Timer1 is not directly readable or writ-
able in this mode. All reads and writes must take place
through the Timer1 High Byte Buffer register. Writes to
TMR1H do not clear the Timer1 prescaler. The
prescaler is only cleared on writes to TMR1L.
12.6
Using Timer1 as a
Real-Time Clock
Adding an external LP oscillator to Timer1 (such as the
one described in Section 12.2 “Timer1 Oscillator”)
gives users the option to include RTC functionality to
their applications. This is accomplished with an inex-
pensive watch crystal to provide an accurate time base
and several lines of application code to calculate the
time. When operating in Sleep mode and using a
battery or supercapacitor as a power source, it can
completely eliminate the need for a separate RTC
device and battery backup.
The application code routine, RTCisr, shown in
Example 12-1, demonstrates a simple method to incre-
ment a counter at one-second intervals using an
Interrupt Service Routine. Incrementing the TMR1
register pair to overflow, triggers the interrupt and calls
the routine, which increments the seconds counter by
one; additional counters for minutes and hours are
incremented as the previous counter overflow.
Since the register pair is 16 bits wide, counting up to
overflow the register directly from a 32.768 kHz clock
would take 2 seconds. To force the overflow at the
required one-second intervals, it is necessary to
preload it; the simplest method is to set the MSb of
TMR1H with a BSF instruction. Note that the TMR1L
register is never preloaded or altered; doing so may
introduce cumulative error over many cycles.
For this method to be accurate, Timer1 must operate in
Asynchronous mode and the Timer1 overflow interrupt
must be enabled (PIE1<0> = 1), as shown in the
routine, RTCinit. The Timer1 oscillator must also be
enabled and running at all times.
Note:
The special event triggers from the CCP1
module will not set interrupt flag bit
TMR1IF (PIR1<0>).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R5F56218BDBG | 制造商:Renesas Electronics Corporation 功能描述:MCU 32BIT RX621 176BGA |
| R5F56218BDBG#U0 | 功能描述:MCU 32BIT FLASH 512KROM 176LFBGA RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:RX600 标准包装:96 系列:PIC® 16F 核心处理器:PIC 芯体尺寸:8-位 速度:20MHz 连通性:I²C，SPI 外围设备:欠压检测/复位，POR，PWM，WDT 输入/输出数:11 程序存储器容量:3.5KB（2K x 14） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:128 x 8 电压 - 电源 (Vcc/Vdd):2.3 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:14-TSSOP（0.173"，4.40mm 宽） 包装:管件 |
| R5F56218BDFB | 制造商:Renesas Electronics Corporation 功能描述:MCU 32BIT RX621 144QFP |
| R5F56218BDFB#V0 | 功能描述:MCU 32BIT FLASH 512K ROM 144LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:RX600 标准包装:96 系列:PIC® 16F 核心处理器:PIC 芯体尺寸:8-位 速度:20MHz 连通性:I²C，SPI 外围设备:欠压检测/复位，POR，PWM，WDT 输入/输出数:11 程序存储器容量:3.5KB（2K x 14） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:128 x 8 电压 - 电源 (Vcc/Vdd):2.3 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:14-TSSOP（0.173"，4.40mm 宽） 包装:管件 |
| R5F56218BDFP | 制造商:Renesas Electronics Corporation 功能描述:MCU 32BIT RX621 100QFP |
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