参数资料
型号: ADUC7034BCPZ
厂商: Analog Devices Inc
文件页数: 5/136页
文件大小: 0K
描述: IC MCU FLASH 32K ANLG IO 48LFCSP
标准包装: 1
系列: MicroConverter® ADuC7xxx
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 20.48MHz
连通性: LIN,SPI,UART/USART
外围设备: POR,PSM,温度传感器,WDT
输入/输出数: 9
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
RAM 容量: 1K x 32
电压 - 电源 (Vcc/Vdd): 3.5 V ~ 18 V
数据转换器: A/D 2x16b
振荡器型: 内部
工作温度: -40°C ~ 115°C
封装/外壳: 48-VFQFN 裸露焊盘,CSP
包装: 托盘
ADuC7034
Rev. B | Page 102 of 136
WAKE-UP (WU) PIN
The wake-up (WU) pin is a high voltage GPIO controlled
through HVCON and HVDAT.
Wake-Up (WU) Pin Circuit Description
By default, the WU pin is configured as an output with an
internal 10 kΩ pull-down resistor and high-side FET driver.
In its default mode of operation, the WU pin is specified to
generate an active high system wake-up request by forcing the
external system WU bus high. User code can assert the WU
output by writing directly to HVCFG0[4].
Note that the output only responds after a 10 μs latency has elapsed;
this latency is inherent in a serial communication between the
HVCON or HVDAT MMR and the high voltage interface (see
The internal FET is capable of sourcing significant current;
therefore, substantial on-chip self-heating may occur if this
driver is asserted for a long time period. For this reason, a
monoflop (that is, a 1.3 sec timeout timer) is included. By
default, the monoflop is enabled and disables the wake-up
driver after 1.3 sec. It is possible to disable the monoflop
through HVCFG1[1]. If the wake-up monoflop is disabled,
the wake-up driver should be disabled after 1.3 sec.
The WU pin also features a short-circuit detection feature. When
the wake-up pin sources more than 100 mA typically for 400 μs,
a high voltage interrupt is generated and HVMON[0] is set.
A thermal shutdown event disables the WU driver. The WU
driver must be re-enabled manually using HVCFG1[3] after a
thermal event.
The WU pin can be configured in I/O mode by writing a 1 to
HVCFG1[4]. In this mode, a rising or falling edge immediately
generates a high voltage interrupt. HVMON[7] directly reflects
the state of the external WU pin and indicates if the external wake-
up bus (including RLOAD = 1 kΩ, CLOAD = 91 nF, and RLIMIT = 39 Ω)
is above or below a typical voltage of 3 V.
VDD
INTERNAL
SENSE
RESISTOR
SHORT-CIRCUIT
TRIP REFERENCE
SHORT-CIRCUIT
PROTECTION
OUTPUT CONTROL
HVMON[0]
NORMAL
HVCFG0[4]
NORMAL
HVMON[7]
400s
GLITCH
IMMUNITY
~1V
ENABLE
READBACK
HVCFG1[4]
INTERNAL
10k
RESISTOR
R1
6.6k
R2
3.3k
IO_VSS
6k
OPEN-CIRCUIT
DIAGNOSTIC
RESISTOR
EXTERNAL
WU PIN
EXTERNAL
WAKE BUS
CLOAD
91nF
RLOAD
1k
EXTERNAL
CURRENT-LIMIT
RESISTOR
39
HVCFG1[0]
0
71
16
-0
37
Figure 41. WU Circuit, Block Diagram
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