參數(shù)資料
型號: MC68HC705C9ACP
廠商: Freescale Semiconductor
文件頁數(shù): 17/118頁
文件大?。?/td> 0K
描述: IC MCU 2.1MHZ 16K 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: 2.1MHz
連通性: SCI,SPI
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 24
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: OTP
RAM 容量: 352 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: 40-DIP(0.600",15.24mm)
包裝: 管件
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
113
Appendix A
EPROM Programming
A.1 Introduction
This section describes programming of the EPROM.
A.2 Bootloader Mode
Bootloader mode is entered upon the rising edge of RESET if the IRQ is at VTST and the TCAP pin is at
logic one. The bootloader code resides in the ROM from $3F00 to $3FEF. This program handles copying
of user code from an external EPROM into the on-chip EPROM. The bootload function does not have to
be done from an external EPROM, but it may be done from a host.
The user code must be a one-to-one correspondence with the internal EPROM addresses.
A.3 Bootloader Functions
Three pins are used to select various bootloader functions: PD5, PD4, and PD3. Two other pins, PC6 and
PC7, are used to drive the PROG LED and the VERF LED, respectively. The programming modes are
shown in Table A-2.
Table A-1. Operating Modes
RESET
IRQ
TCAP
Mode
VSS to VDD
VTST
VSS to VDD
VDD
User
Bootloader
Table A-2. Bootloader Functions
PD5
PD4
PD3
Mode
0
Program/verify
0
1
Verify only
0
1
0
Load RAM and execute
1
X
Secure
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