參數(shù)資料
型號(hào): MCM16Y1BACFT16
廠(chǎng)商: MOTOROLA INC
元件分類(lèi): 微控制器/微處理器
英文描述: 16-BIT, MROM, MICROCONTROLLER, PQFP160
封裝: QFP-160
文件頁(yè)數(shù): 70/138頁(yè)
文件大?。?/td> 784K
代理商: MCM16Y1BACFT16
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MC68HC16Y1
MOTOROLA
MC68HC16Y1TS/D
37
BERR, BKPT, and MODCLK do not have internal pull-ups and must be driven to the desired state during
reset.
Operating mode determines which address and data bus lines are used and which general-purpose I/
O ports are available. The table below summarizes bus and port configuration.
Many pins on the MC68HC16, including data and address bus pins, have multiple functions. Reset val-
ue for these pins depends on operating mode. In expanded mode, the values of DATA[11:0] during re-
set determines the function of these pins. The functions of some pins can be changed subsequently by
writing to the appropriate pin assignment register. Data bus pins have internal pull-ups and must be
pulled low to achieve the desired alternate configuration. The following tables summarize pin configu-
ration options for each operating mode.
Table 8 Basic Configuration Options
Select Pin
Default Function
(Pin Left High)
Alternate Function
(Pin Pulled Low)
MODCLK
Synthesized system clock
External system clock
BKPT
Background Mode Disabled
Background Mode Enabled
BERR
Expanded Mode
Single-Chip Mode
DATA1 (if BERR = 1)
8-Bit Expanded Mode
16-Bit Expanded Mode
Table 9 Bus and Port Configuration Options
Mode
Address Bus
Data Bus
I/O Ports
16-Bit Expanded
ADDR[18:3]
DATA[15:0]
8-Bit Expanded
ADDR[18:3]
DATA[15:8]
DATA[7:0] = Port H
Single Chip
None
ADDR[18:11] = Port A
ADDR[10:3] = Port B
DATA[15:8] = Port G
DATA[7:0] = Port H
相關(guān)PDF資料
PDF描述
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