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參數資料
型號： MC68HC916X1
廠商： Motorola, Inc.
英文描述： 16-Bit Modular Microcontroller(16位模塊化微控制器)
中文描述： 16位微控制器模塊（16位模塊化微控制器）
文件頁數： 20/172頁
文件大小： 1035K
代理商： MC68HC916X1
MOTOROLA
20
MC68HC916X1
MC68HC916X1TS/D
3.2.5 Emulation Support
The SCIM contains logic that can be used to replace on-chip ports externally. The SCIM also con-
tains special support logic that allows external emulation of internal ROM. This emulation support
feature enables the development of a single-chip application in expanded mode.
Emulator mode is a special type of 16-bit expanded operation. It is entered by holding DATA10 low,
BERR high, and DATA1 low during reset. In emulator mode, all port A, B, E, G, and H data and data
direction registers and the port E pin assignment register are mapped externally. Port C data, port
F data and data direction registers, and port F pin assignment register are accessible normally in
emulator mode.
An emulator chip select (CSE) is asserted whenever any of the externally-mapped registers are ad-
dressed. The signal is asserted on the falling edge of AS. The SCIM does not respond to these ac-
cesses, allowing external logic, such as a port replacement unit (PRU) to respond. Accesses to
externally mapped registers require three clock cycles.
External ROM emulation is enabled by holding DATA1, DATA10, and DATA13 low during reset
(BERR must be held high during reset to enable the ROM module). While ROM emulation mode is
enabled, memory chip select signal CSM is asserted whenever a valid access to an address as-
signed to the masked ROM array is made.
The ROM module does not acknowledge IMB accesses while in emulation mode. This causes the
SCIM to run an external bus cycle for each access.
NOTE
The MC68HC916X1 flash modules do not yet support the emulator mode. If ROM
emulation is enabled, the CSM chip-select will be driven high at all times.
3.3 System Clock
The system clock provides timing signals for the IMB modules and for an external peripheral bus.
Because the MCU is a fully static design, register and memory contents are not affected when the
clock rate changes. System hardware and software support changes in clock rate during operation.
The system clock signal can be generated from one of two sources. An internal phase-locked loop
(PLL) can synthesize the clock from a fast reference, or the clock signal can be input directly from
an external frequency source. The fast reference is typically a 4.194 MHz crystal, but may be gen-
erated by sources other than a crystal. Keep these sources in mind while reading the rest of this
section.
Figure 5
is a block diagram of the clock submodule.
相關PDF資料
PDF描述
MC68HC9D60 Advance Information - Rev 4.0
MC68HC12D60 Advance Information - Rev 4.0
MC68HCL05C8A 8-Bit Microcontroller Units (MCU).(8位微控制器)
MC68HSC05C8A 8-Bit Microcontroller Units (MCU).(8位微控制器)
MC68HCP11 8-Bit Microcontrollers
相關代理商/技術參數
參數描述
MC68HC98LJ12CFU 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HC98LJ12CFUE 功能描述:8位微控制器 -MCU 8 BIT MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68HC9S08RC60 L33R DIE 制造商:Motorola Inc 功能描述:
MC68HCP11A1CFN3 功能描述:8位微控制器 -MCU 8-bit HCMOS single chip MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68HCP11A1FN 制造商:MOTORALA 功能描述:
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