參數(shù)資料
型號: 87LPC769
廠商: NXP Semiconductors N.V.
英文描述: Low power, low price, low pin count(20 pin) microcontroller with 4 kB OTP and 8-bit A/D,and DAC(帶4 kB OTP、8位A/D和D/A轉(zhuǎn)換的低功耗,低價格,少引腳(20引腳)的微控制器)
中文描述: 低功耗,低價格,低引腳數(shù)(20針)與4 KB的檢察官辦公室和8位A / D,和DAC(帶4 KB的檢察官辦公室,8位微控制器的A / D和的D / A轉(zhuǎn)換的低功耗,低價格,少引腳(20引腳)的微控制器)
文件頁數(shù): 38/61頁
文件大?。?/td> 275K
代理商: 87LPC769
Philips Semiconductors
Preliminary specification
87LPC769
Low power, low price, low pin count (20 pin)
microcontroller with 4 kB OTP 8-bit A/D, and DAC
2000 Apr 26
35
Mode 1
Mode 1 is the same as Mode 0, except that all 16 bits of the timer
register (THn and TLn) are used. See Figure 28
Mode 2
Mode 2 configures the Timer register as an 8-bit Counter (TL1) with
automatic reload, as shown in Figure 29. Overflow from TLn not only
sets TFn, but also reloads TLn with the contents of THn, which must
be preset by software. The reload leaves THn unchanged. Mode 2
operation is the same for Timer 0 and Timer 1.
Mode 3
When Timer 1 is in Mode 3 it is stopped. The effect is the same as
setting TR1 = 0.
Timer 0 in Mode 3 establishes TL0 and TH0 as two separate 8-bit
counters. The logic for Mode 3 on Timer 0 is shown in Figure 30.
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. Thus, TH0 now
controls the “Timer 1” interrupt.
Mode 3 is provided for applications that require an extra 8-bit timer.
With Timer 0 in Mode 3, an 87LPC769 can look like it has three
Timer/Counters. When Timer 0 is in Mode 3, Timer 1 can be turned
on and off by switching it into and out of its own Mode 3. It can still
be used by the serial port as a baud rate generator, or in any
application not requiring an interrupt.
SU01174
TLN
(8-BITS)
THN
(8-BITS)
OSC/6 OR
OSC/12
OVERFLOW
Tn PIN
TnOE
TOGGLE
CONTROL
C/T = 1
C/T = 0
Tn PIN
TRn
GATE
INTn PIN
INTERRUPT
TFn
Figure 28. Timer/Counter 0 or 1 in Mode 1 (16-Bit Counter)
SU01392
TLN
(8-BITS)
THN
(8-BITS)
OSC/6 OR
OSC/12
OVERFLOW
Tn PIN
TnOE
TOGGLE
CONTROL
C/T = 1
C/T = 0
Tn PIN
TRn
GATE
INTn PIN
INTERRUPT
TFn
RELOAD
Figure 29. Timer/Counter 0 or 1 in Mode 2 (8-Bit Auto-Reload)
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