參數(shù)資料
型號： ADUC848BSZ32-5
廠商： Analog Devices Inc
文件頁數(shù)： 84/108頁
文件大?。?/td> 0K
描述： IC MCU FLASH W/16BIT ADC 52MQFP
標(biāo)準(zhǔn)包裝： 1
系列： MicroConverter® ADuC8xx
核心處理器： 8052
芯體尺寸： 8-位
速度： 12.58MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： POR，PSM，PWM，溫度傳感器，WDT
輸入/輸出數(shù)： 34
程序存儲器容量： 32KB（32K x 8）
程序存儲器類型： 閃存
EEPROM 大小： 4K x 8
RAM 容量： 2.25K x 8
電壓 - 電源 (Vcc/Vdd)： 4.75 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x16b; D/A 1x12b，2x16b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 125°C
封裝/外殼： 52-QFP
包裝： 托盤
Data Sheet
ADuC845/ADuC847/ADuC848
Rev. C | Page 77 of 108
Timer/Counter 0 and 1 Operating Modes
This section describes the operating modes for Timer/Counters
0 and 1. Unless otherwise noted, these modes of operation are
the same for both Timer 0 and Timer 1.
Mode 0 (13-Bit Timer/Counter)
Mode 0 configures an 8-bit timer/counter. Figure 52 shows
Mode 0 operation. Note that the divide-by-12 prescaler is not
present on the single-cycle core.
04741-049
CORE
CLK1
CONTROL
P3.4/T0
GATE
P3.2/INT0
TR0
TF0
TL0
(5 BITS)
TH0
(8 BITS)
INTERRUPT
C/ T = 0
C/ T = 1
NOTES
1.
THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
Figure 52. Timer/Counter 0, Mode 0
In this mode, the timer register is configured as a 13-bit register.
As the count rolls over from all 1s to all 0s, it sets the timer
overflow flag, TF0. TF0 can then be used to request an
interrupt. The counted input is enabled to the timer when TR0
= 1 and either Gate = 0 or INT0 = 1. Setting Gate = 1 allows the
timer to be controlled by external input INT0 to facilitate pulse-
width measurements. TR0 is a control bit in the special function
register TCON; Gate is in TMOD. The 13-bit register consists of
all 8 bits of TH0 and the lower 5 bits of TL0. The upper 3 bits of
TL0 are indeterminate and should be ignored. Setting the run
flag (TR0) does not clear the registers.
Mode 1 (16-Bit Timer/Counter)
Mode 1 is the same as Mode 0 except that the Mode 1 timer
register runs with all 16 bits. Mode 1 is shown in Figure 53.
CORE
CLK1
CONTROL
P3.4/T0
GATE
TR0
TF0
TL0
(8 BITS)
TH0
(8 BITS)
INTERRUPT
04741-050
0
P3.2/INT
C/ T = 0
C/ T = 1
NOTES
1.
THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
Figure 53. Timer/Counter 0, Mode 1
Mode 2 (8-Bit Timer/Counter with Autoreload)
Mode 2 configures the timer register as an 8-bit counter (TL0)
with automatic reload as shown in Figure 54. Overflow from TL0
not only sets TF0, but also reloads TL0 with the contents of TH0,
which is preset by software. The reload leaves TH0 unchanged.
CONTROL
TF0
TL0
(8 BITS)
INTERRUPT
RELOAD
TH0
(8 BITS)
CORE
CLK1
P3.4/T0
GATE
TR0
0
04741-051
P3.2/INT
C/ T = 0
C/ T = 1
NOTES
1.
THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
Figure 54. Timer/Counter 0, Mode 2
Mode 3 (Two 8-Bit Timer/Counters)
Mode 3 has different effects on Timer 0 and Timer 1. Timer 1 in
Mode 3 simply holds its count. The effect is the same as setting
TR1 = 0. Timer 0 in Mode 3 establishes TL0 and TH0 as two
separate counters. This configuration is shown in Figure 55.
TL0 uses the Timer 0 Control Bits C/T, Gate, TR0, INT0, and
TF0. TH0 is locked into a timer function (counting machine
cycles) and takes over the use of TR1 and TF1 from Timer 1.
Therefore, TH0 then controls the Timer 1 interrupt. Mode 3
is provided for applications requiring an extra 8-bit timer or
counter.
When Timer 0 is in Mode 3, Timer 1 can be turned on and off
by switching it out of and into its own Mode 3, or it can still be
used by the serial interface as a baud rate generator. In fact, it
can be used in any application not requiring an interrupt from
Timer 1 itself.
CONTROL
CORE
CLK/12
TF0
TL0
(8 BITS)
INTERRUPT
CORE
CLK1
P3.4/T0
GATE
TR0
TF1
TH0
(8 BITS)
INTERRUPT
CORE
CLK/12
TR1
04741-052
0
P3.2/INT
C/ T = 0
C/ T = 1
NOTES
1.
THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
Figure 55. Timer/Counter 0, Mode 3
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