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參數(shù)資料
| 型號： | P87LPC769 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D, and DAC |
| 中文描述： | 低功耗，低價(jià)格，低引腳數(shù)20 4 KB的檢察官辦公室8引腳微控制器位A / D，和DAC |
| 文件頁數(shù)： | 28/61頁 |
| 文件大?。?/td> | 306K |
| 代理商： | P87LPC769 |
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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
2001 Jan 11
25
BIT
P2M1.7
P2M1.6
P2M1.5
P2M1.4
SYMBOL
P2S
P1S
P0S
ENCLK
FUNCTION
When P2S = 1, this bit enables Schmitt trigger inputs on Port 2.
When P1S = 1, this bit enables Schmitt trigger inputs on Port 1.
When P0S = 1, this bit enables Schmitt trigger inputs on Port 0.
When ENCLK is set and the 87LPC769 is configured to use the on-chip RC oscillator, a clock
output is enabled on the X2 pin (P2.0). Refer to the Oscillator section for details.
When set, the P.7 pin is toggled whenever Timer 1 overflows. The output frequency is therefore
one half of the Timer 1 overflow rate. Refer to the Timer/Counters section for details.
When set, the P1.2 pin is toggled whenever Timer 0 overflows. The output frequency is therefore
one half of the Timer 0 overflow rate. Refer to the Timer/Counterssection for details.
These bits, along with the matching bits in the P2M2 register, control the output configuration of
P2.1 and P2.0 respectively, as shown in Table 4.
P2M1.3
ENT1
P2M1.2
ENT0
P2M1.1, P2M1.0
—
(P2M1.0)
SU01373
(P2M1.1)
ENT0
ENT1
ENCLK
P0S
P1S
P2S
0
1
2
3
4
5
6
7
P2M1
Reset Value: 00h
Not Bit Addressable
Address: A4h
Figure 16. Port 2 Mode Register 1 (P2M1)
Keyboard Interrupt (KBI)
The Keyboard Interrupt function is intended primarily to allow a
single interrupt to be generated when any key is pressed on a
keyboard or keypad connected to specific pins of the 87LPC769, as
shown in Figure 17. This interrupt may be used to wake up the CPU
from Idle or Power Down modes. This feature is particularly useful in
handheld, battery powered systems that need to carefully manage
power consumption yet also need to be convenient to use.
The 87LPC769 allows any or all pins of port 0 to be enabled to
cause this interrupt. Port pins are enabled by the setting of bits in
the KBI register, as shown in Figure 18. The Keyboard Interrupt Flag
(KBF) in the AUXR1 register is set when any enabled pin is pulled
low while the KBI interrupt function is active. An interrupt will
generated if it has been enabled. Note that the KBF bit must be
cleared by software.
Due to human time scales and the mechanical delay associated with
keyswitch closures, the KBI feature will typically allow the interrupt
service routine to poll port 0 in order to determine which key was
pressed, even if the processor has to wake up from Power Down
mode. Refer to the section on Power Reduction Modes for details.
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相關(guān)代理商/技術(shù)參數(shù) |
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| P87LPC769HD | 功能描述:8位微控制器 -MCU 80C51 4K/128 OTP ADC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| P87LPC769HD,512 | 功能描述:8位微控制器 -MCU 80C51 4K/128 OTP ADC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| P87LPC769HD,518 | 功能描述:8位微控制器 -MCU 20 PIN MCU 4KBYTE OTP 8-BIT A/D DAC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| P87LPC769HD512 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:IC-SM-8-BIT MCU |
| P87LPC778 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit 80C51 microcontroller 128-byte data RAM, 8 kB OTP |
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