收藏本站
参数资料
型号： R5F56217BDLE#U0
厂商： Renesas Electronics America
文件页数： 41/148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
2004 Microchip Technology Inc.
DS39609B-page 133
PIC18F6520/8520/6620/8620/6720/8720
11.1
Timer0 Operation
Timer0 can operate as a timer or as a counter.
Timer mode is selected by clearing the T0CS bit. In
Timer mode, the Timer0 module will increment every
instruction cycle (without prescaler). If the TMR0 regis-
ter is written, the increment is inhibited for the following
two instruction cycles. The user can work around this
by writing an adjusted value to the TMR0 register.
Counter mode is selected by setting the T0CS bit. In
Counter mode, Timer0 will increment, either on every
rising or falling edge of pin RA4/T0CKI. The increment-
ing edge is determined by the Timer0 Source Edge
Select bit (T0SE). Clearing the T0SE bit selects the
rising edge. Restrictions on the external clock input are
discussed below.
When an external clock input is used for Timer0, it must
meet certain requirements. The requirements ensure
the external clock can be synchronized with the internal
phase clock (TOSC). Also, there is a delay in the actual
incrementing of Timer0 after synchronization.
11.2
Prescaler
An 8-bit counter is available as a prescaler for the Timer0
module. The prescaler is not readable or writable.
The PSA and T0PS2:T0PS0 bits determine the
prescaler assignment and prescale ratio.
Clearing bit PSA will assign the prescaler to the Timer0
module. When the prescaler is assigned to the Timer0
module, prescale values of 1:2, 1:4, ..., 1:256 are
selectable.
When assigned to the Timer0 module, all instructions
writing to the TMR0 register (e.g., CLRF TMR0, MOVWF
TMR0
, BSF TMR0, x, ..., etc.) will clear the prescaler
count.
11.2.1
SWITCHING PRESCALER
ASSIGNMENT
The prescaler assignment is fully under software
control, (i.e., it can be changed “on-the-fly” during
program execution).
11.3
Timer0 Interrupt
The TMR0 interrupt is generated when the TMR0
register overflows from FFh to 00h in 8-bit mode, or
FFFFh to 0000h in 16-bit mode. This overflow sets the
TMR0IF bit. The interrupt can be masked by clearing
the TMR0IE bit. The TMR0IF bit must be cleared in
software by the Timer0 module Interrupt Service
Routine before re-enabling this interrupt. The TMR0
interrupt cannot awaken the processor from Sleep,
since the timer is shut-off during Sleep.
11.4
16-Bit Mode Timer Reads
and Writes
TMR0H is not the high byte of the timer/counter in
16-bit mode, but is actually a buffered version of the
high byte of Timer0 (refer to Figure 11-2). The high byte
of the Timer0 counter/timer is not directly readable nor
writable. TMR0H is updated with the contents of the
high byte of Timer0 during a read of TMR0L. This pro-
vides the ability to read all 16 bits of Timer0 without
having to verify that the read of the high and low byte
were valid, due to a rollover between successive reads
of the high and low byte.
A write to the high byte of Timer0 must also take place
through the TMR0H Buffer register. Timer0 high byte is
updated with the contents of TMR0H when a write
occurs to TMR0L. This allows all 16 bits of Timer0 to be
updated at once.
TABLE 11-1:
REGISTERS ASSOCIATED WITH TIMER0
Note:
Writing to TMR0 when the prescaler is
assigned
to
Timer0,
will
clear
the
prescaler count, but will not change the
prescaler assignment.
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on
all other
Resets
TMR0L
Timer0 Module Low Byte Register
xxxx xxxx uuuu uuuu
TMR0H
Timer0 Module High Byte Register
0000 0000 0000 0000
INTCON
GIE/GIEH PEIE/GIEL TMR0IE INT0IE
RBIE
TMR0IF INT0IF
RBIF
0000 0000 0000 0000
T0CON
TMR0ON
T08BIT
T0CS
T0SE
PSA
T0PS2
T0PS1
T0PS0 1111 1111 1111 1111
TRISA
—
PORTA Data Direction Register
-111 1111 -111 1111
Legend: x = unknown, u = unchanged, – = unimplemented locations, read as ‘0’.
Shaded cells are not used by Timer0.
相关PDF资料
PDF描述
D38999/24MD97SN CONN RCPT 12POS JAM NUT W/SCKT
MS27656E23B21S CONN RCPT 21POS WALL MNT W/SCKT
D38999/26FE99SB CONN PLUG 23POS STRAIGHT W/SCKT
D38999/24MF11PN CONN RCPT 11POS JAM NUT W/PINS
D38999/24WD97JN CONN RCPT 12POS JAM NUT W/SCKT
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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*