參數(shù)資料
型號(hào): MCHRC705KJ1CDWE
廠商: Freescale Semiconductor
文件頁數(shù): 79/108頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 64 BYTES RAM 16-S0IC
標(biāo)準(zhǔn)包裝: 47
系列: HC05
核心處理器: HC05
芯體尺寸: 8-位
速度: 4MHz
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 10
程序存儲(chǔ)器容量: 1.2KB(1.2K x 8)
程序存儲(chǔ)器類型: OTP
RAM 容量: 64 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-SOIC(0.295",7.50mm 寬)
包裝: 管件
Resets and Interrupts
MC68HC705KJ1 MC68HRC705KJ1 MC68HLC705KJ1 Data Sheet, Rev. 4.1
72
Freescale Semiconductor
8.2.1 Power-On Reset
A positive transition on the VDD pin generates a power-on reset.
NOTE
The power-on reset is strictly for power-up conditions and cannot be used
to detect drops in power supply voltage.
A 4064-tcyc (internal clock cycle) delay after the oscillator becomes active allows the clock generator to
stabilize. If any reset source is active at the end of this delay, the MCU remains in the reset condition until
all reset sources are inactive.
Figure 8-2. Power-On Reset Timing
8.2.2 External Reset
A logic 0 applied to the RESET pin for 1 1/2 tcyc generates an external reset. A Schmitt trigger senses the
logic level at the RESET pin.
Figure 8-3. External Reset Timing
Table 8-1. External Reset Timing
Characteristic
Symbol
Min
Max
Unit
RESET Pulse Width
tRL
1.5
tcyc
OSCILLATOR STABILIZATION DELAY(2)
VDD
OSC1 PIN
INTERNAL
CLOCK
INTERNAL
ADDRESS BUS
Notes:
INTERNAL
DATA BUS
1. Power-on reset threshold is typically between 1 V and 2 V.
2. 4064 cycles or 128 cycles, depending on state of SOSCD bit in MOR
$07FE
$07FF
NEW PCH
NEW PCL
(NOTE 1)
3. Internal clock, internal address bus, and internal data bus are not available externally.
INTERNAL
CLOCK
INTERNAL
ADDRESS BUS
Notes:
INTERNAL
DATA BUS
$07FE
$07FF
NEW PC
1. Internal clock, internal address bus, and internal data bus are not available externally.
2. The next rising edge of the internal clock after the rising edge of RESET initiates the reset sequence.
NEW
PCH
tRL
NEW PC
NEW
PCL
DUMMY
OP
CODE
RESET
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