參數(shù)資料
型號: R5F56218BDBG#U0
廠商: Renesas Electronics America
文件頁數(shù): 55/148頁
文件大小: 0K
描述: MCU 32BIT FLASH 512KROM 176LFBGA
產(chǎn)品培訓模塊: RX Compare Match Timer
RX DMAC
標準包裝: 1
系列: RX600
核心處理器: RX
芯體尺寸: 32-位
速度: 100MHz
連通性: CAN,EBI/EMI,I²C,SCI,SPI,USB
外圍設(shè)備: DMA,LVD,POR,PWM,WDT
輸入/輸出數(shù): 126
程序存儲器容量: 512KB(512K x 8)
程序存儲器類型: 閃存
RAM 容量: 96K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10/12b,D/A 2x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 176-LFBGA
包裝: 托盤
2004 Microchip Technology Inc.
DS39609B-page 147
PIC18F6520/8520/6620/8620/6720/8720
15.0
TIMER4 MODULE
The Timer4 module timer has the following features:
8-bit timer (TMR4 register)
8-bit period register (PR4)
Readable and writable (both registers)
Software programmable prescaler (1:1, 1:4, 1:16)
Software programmable postscaler (1:1 to 1:16)
Interrupt on TMR4 match of PR4
Timer4 has a control register shown in Register 15-1.
Timer4 can be shut-off by clearing control bit, TMR4ON
(T4CON<2>), to minimize power consumption. The
prescaler and postscaler selection of Timer4 are also
controlled by this register. Figure 15-1 is a simplified
block diagram of the Timer4 module.
15.1
Timer4 Operation
Timer4 can be used as the PWM time base for the
PWM mode of the CCP module. The TMR4 register is
readable and writable and is cleared on any device
Reset. The input clock (FOSC/4) has a prescale option
of
1:1,
1:4
or
1:16,
selected
by
control
bits
T4CKPS1:T4CKPS0 (T4CON<1:0>). The match out-
put of TMR4 goes through a 4-bit postscaler (which
gives a 1:1 to 1:16 scaling inclusive) to generate a
TMR4 interrupt, latched in flag bit, TMR4IF (PIR3<3>).
The prescaler and postscaler counters are cleared
when any of the following occurs:
a write to the TMR4 register
a write to the T4CON register
any device Reset (Power-on Reset, MCLR Reset,
Watchdog Timer Reset or Brown-out Reset)
TMR4 is not cleared when T4CON is written.
REGISTER 15-1:
T4CON: TIMER4 CONTROL REGISTER
U-0
R/W-0
T4OUTPS3 T4OUTPS2 T4OUTPS1 T4OUTPS0 TMR4ON T4CKPS1
T4CKPS0
bit 7
bit 0
bit 7
Unimplemented: Read as ‘0’
bit 6-3
T4OUTPS3:T4OUTPS0: Timer4 Output Postscale Select bits
0000
= 1:1 Postscale
0001
= 1:2 Postscale
1111
= 1:16 Postscale
bit 2
TMR4ON: Timer4 On bit
1
= Timer4 is on
0
= Timer4 is off
bit 1-0
T4CKPS1:T4CKPS0: Timer4 Clock Prescale Select bits
00
= Prescaler is 1
01
= Prescaler is 4
1x
= Prescaler is 16
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
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