- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1949 > MC68HC16Z1VEH16 (Freescale Semiconductor)IC MCU 16BIT 1K FLASH 132-PQFP PDF資料下載
參數(shù)資料
| 型號： | MC68HC16Z1VEH16 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 48/56頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU 16BIT 1K FLASH 132-PQFP |
| 標準包裝： | 36 |
| 系列： | HC16 |
| 核心處理器： | CPU16 |
| 芯體尺寸： | 16-位 |
| 速度： | 16MHz |
| 連通性： | EBI/EMI，SCI，SPI |
| 外圍設(shè)備： | POR，PWM，WDT |
| 輸入/輸出數(shù)： | 16 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 1K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 105°C |
| 封裝/外殼： | 132-BQFP 緩沖式 |
| 包裝： | 托盤 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁當前第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁
MC68HC16Z1TUT/D
In Table 8 the addresses for CS0 and CS10 conflict. Both will respond to the address $40000. CS0 is
programmed to start at $50000; however, it is programmed incorrectly. It does not lie on an even bound-
ary of 128 Kbytes (remember that 1 Kbyte = 1024 bytes). As shown in Table 9, only address lines 23
through 17 are compared for a block size of 128 Kbytes. The address decoding process works as fol-
lows.
CSBAR0: $0504 = base address of $50000 and block size of 128K.
For a 128 Kbyte block size, address lines 16–0 are decoded as zero. As a result, bits [19:16] are read
as a four instead of a five, and CS0 responds to the address space starting at location $40000. How-
ever, CS10 is also programmed to respond to the address space starting at location $40000. It is ac-
ceptable for two chip-select circuits to respond to the same address space; however, in this case, the
option registers are programmed for a different number of wait states. As a result, the first termination
signal seen will be from CS0 after three wait states on any read or write access, possibly before the
external device is ready to respond, especially if it was meant to have CS10 terminate the cycle after
12 wait states.
To correct the problem, the values in CSBAR0 and/or CSBAR10 must be changed. If the value in
CSBAR0 is changed to $0404, and the value in CSBAR10 is changed to a base address that does not
overlap, such as $0300, then $40000 is an acceptable base address for CS0, since it is an exact mul-
tiple of 128 Kbytes. That is:
1K = $400
128K = $20000
$40000/$20000 = 2 = an integer
Therefore, $40000 is on a 128 Kbyte boundary
5.2.9 Problem: A Chip-Select Does Not Assert
Ensure that a valid base address is written to the chip-select base address register. Because the
CPU16 does not recognize addresses $80000 to $F7FFFF, base address register values $0800 to
$F7FF are invalid.
5.3 Problem: ADC Results are Inaccurate
1. Ensure that VDDA and VSSA are as noise-free as possible and are as isolated from the digital
power supply as possible.
2. Ensure that VRH and VRL are within the voltage limits specified by VDDA and VSSA and that they
are as noise-free and clean as possible.
3. Ensure that the analog inputs to AD[0:7] are within the voltage limits specified by VRH and VRL
and that they are as noise-free and clean as possible. Also, ensure that the inputs are low-leak-
age/low impedance. Ensure that the input current does not exceed the disruptive input current
specification for the device.
110
512 Kbyte
ADDR[23:19]
111
1 Mbyte
ADDR[23:20]
23 20 19 16 15 12 11 8 7
4
3
0
$5000 =
0000
0101
0000
Table 9 Block Size Encodings for Chip-Selects
BLKSZ[2:0]
Block Size
Address Lines Compared
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC705B16NCFN | IC MCU 2.1MHZ 15K OTP 52-PLCC |
| MC68HC705C9ACFB | IC MCU 16K 2.1MHZ OTP 44-QFP |
| MC68HC705JP7CDW | IC MCU 8BIT 28-SOIC |
| MC68HC705KJ1CP | IC MCU 4MHZ 1.2K OTP 16-DIP |
| MC68HC705P6ACP | IC MCU 2.1MHZ 4.5K OTP 28-DIP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC16Z1VEH16 | 制造商:Freescale Semiconductor 功能描述:Microcontroller |
| MC68HC16Z1VFC16 | 制造商:Rochester Electronics LLC 功能描述:16 BIT MCU, 1K RAM - Bulk |
| MC68HC16Z3BCFC16 | 制造商:Rochester Electronics LLC 功能描述: |
| MC68HC16Z3BCPV16 | 制造商:Rochester Electronics LLC 功能描述:16BIT MCU, 4KRAM, 8KROM - Bulk |
| MC68HC16Z3BCPV25 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Freescale Semiconductor 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。