參數(shù)資料
型號(hào)： MC68CK331CAG16
廠商： Freescale Semiconductor
文件頁數(shù)： 26/84頁
文件大?。?/td> 0K
描述： IC MCU 32BIT 144-LQFP
標(biāo)準(zhǔn)包裝： 60
系列： M683xx
核心處理器： CPU32
芯體尺寸： 32-位
速度： 16MHz
連通性： EBI/EMI，SCI，SPI，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 18
程序存儲(chǔ)器類型： ROMless
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 144-LQFP
包裝： 托盤
32
MC68331TS/D
ADDR[23:11] —Base Address Field
This field sets the starting address of a particular address space. The address compare logic uses only
the most significant bits to match an address within a block. The value of the base address must be a
multiple of block size. Base address register diagrams show how base register bits correspond to ad-
dress lines.
3.5.4 Option Registers
The option registers contain eight fields that determine timing of and conditions for assertion of chip-
select signals. For a chip-select signal to be asserted, all bits in the base address register must match
the corresponding internal upper address lines, and all conditions specified in the option register must
be satisfied. These conditions also apply to providing DSACK or autovector support.
CSORBT, the option register for CSBOOT, contains special reset values that support bootstrap opera-
tions from peripheral memory devices.
The following bit descriptions apply to both CSORBT and CSOR[10:0] option registers.
MODE —Asynchronous/Synchronous Mode
0 = Asynchronous mode selected (chip-select assertion determined by internal or external bus con-
trol signals)
1 = Synchronous mode selected (chip-select assertion synchronized with ECLK signal)
In asynchronous mode, the chip select is asserted synchronized with AS or DS.
The DSACK field is not used in synchronous mode because a bus cycle is only performed as a syn-
chronous operation. When a match condition occurs on a chip select programmed for synchronous op-
eration, the chip select signals the EBI that an ECLK cycle is pending.
BYTE —Upper/Lower Byte Option
This field is used only when the chip-select 16-bit port option is selected in the pin assignment register.
The following table lists upper/lower byte options.
Block Size Field
Block Size
Address Lines Compared
000
2 K
ADDR[23:11]
001
8 K
ADDR[23:13]
010
16 K
ADDR[23:14]
011
64 K
ADDR[23:16]
100
128 K
ADDR[23:17]
101
256 K
ADDR[23:18]
110
512 K
ADDR[23:19]
111
1 M
ADDR[23:20]
CSORBT —Chip-Select Option Register Boot ROM
$YFFA4A
15
14
13
12
11
10
9
6
5
4
3
1
0
MODE
BYTE
R/W
STRB
DSACK
SPACE
IPL
AVEC
RESET:
0
1
0
1
0
1
0
CSOR[10:0] —Chip-Select Option Registers
$YFFA4E–$YFFA76
15
14
13
12
11
10
9
6
5
4
3
1
0
MODE
BYTE
R/W
STRB
DSACK
SPACE
IPL
AVEC
RESET:
0
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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