參數(shù)資料
型號(hào): MC68HC705SR3PE
廠商: Freescale Semiconductor
文件頁數(shù): 73/96頁
文件大?。?/td> 0K
描述: IC MCU 3.75K 2.1MHZ OTP 40-DIP
標(biāo)準(zhǔn)包裝: 9
系列: HC05
核心處理器: HC05
芯體尺寸: 8-位
速度: 4MHz
外圍設(shè)備: LED,POR
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 3.75KB(3.75K x 8)
程序存儲(chǔ)器類型: OTP
RAM 容量: 192 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x8b
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
MC68HC05SR3
Freescale
10-3
OPERATING MODES
10
10.3
Bootstrap Mode
The Bootstrap mode is provided in the EPROM part (MC68HC705SR3) as a mean of
self-programming its EPROM with minimal circuitry. Bootstrap mode will be entered on the rising
edge of RESET when the VPP pin is at VTST (2×VDD) and PB1 pin is at VDD. Once in the bootstrap
mode, PB1 can then be used for other purposes. After entering the bootstrap mode, CPU
branches to the bootstrap program and carries out the EPROM programming routine. The user
EPROM consists of 3840 bytes, from location $1000 to $1EFF.
Refer to Appendix A for further details on MC68HC705SR3.
Table 10-2 Self-Check Report
D4
D3
D2
D1
REMARKS
Flashing
O.K. (self-check is on-going)
1
Bad port A
1
0
Bad port B
1
0
1
Bad port C
1
0
Bad port D
10
11
Bad RAM
10
Bad ROM
10
00
Bad SWI
01
11
Bad IRQ
1=LED on, 0=LED off
TPG
73
05SR3.Book Page 3 Thursday, August 4, 2005 1:08 PM
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