参数资料
型号: MC68HC705C9ACP
厂商: Freescale Semiconductor
文件页数: 17/118页
文件大小: 0K
描述: IC MCU 2.1MHZ 16K OTP 40-DIP
标准包装: 9
系列: HC05
核心处理器: HC05
芯体尺寸: 8-位
速度: 2.1MHz
连通性: SCI,SPI
外围设备: POR,WDT
输入/输出数: 24
程序存储器容量: 16KB(16K x 8)
程序存储器类型: OTP
RAM 容量: 352 x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 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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