- 您现在的位置：买卖IC网 > PDF目录85254 > SPMC16V1CPU20 (MOTOROLA INC) 16-BIT, MROM, 20.97 MHz, MICROCONTROLLER, PQFP100 PDF资料下载
参数资料
| 型号： | SPMC16V1CPU20 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 20.97 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | TQFP-100 |
| 文件页数： | 59/128页 |
| 文件大小： | 571K |
| 代理商： | SPMC16V1CPU20 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页当前第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页
MOTOROLA
MC68HC16V1
36
MC68HC16V1TS/D
Convert the result of the formula above into hexadecimal and place the MSW in the SWP register and
the LSW in the RTP register.
These calculations give the real-time period ranges shown in Table 17.
3.5 External Bus Interface
The external bus interface (EBI) transfers information between the internal MCU bus and external de-
vices. The external bus has 18 address lines and 16 data lines.
The EBI operates as a bus master and allows the CPU to access external memory resources. The EBI
runs external bus cycles based on the programming of the chip-select base address and option regis-
ters, and the chip select pin options programmed in the port D pin assignment register.
The EBI supports byte, word, and long-word transfers. Ports are accessed through the use of asynchro-
nous cycles controlled by the data size (SIZE) and data transfer acknowledge (DTACK) pins.
External bus operation is synchronous to the clock output (CLKOUT) signal. The external bus speed is
programmable from two to 16 clock cycles (0 to 14 wait states) with optional external bus termination
using the DTACK signal. The bus speed is programmed on a per chip-select basis in the DTACK field
of each chip-select option register (CSOR).
At least one chip-select must be programmed to provide external bus cycle termination unless bus cy-
cles are to be terminated by the use of the DTACK function. Chip-selects used to access external mem-
ories or peripherals can be programmed for 8- or 16-bit, multiplexed or non-multiplexed accesses on a
per chip-select basis. Operation of the boot chip-select, CSB, can be overridden by the state of the
ADDR/DATA[8:7] pins during reset. Refer to 3.6.2 Default Configuration Override During Reset for
more information.
3.5.1 Transfer Size
At the beginning of a bus cycle, the SIZE signal is driven along with the function code signals. The SIZE
signal is only relevant for 16-bit port accesses and indicates the number of bytes remaining to be trans-
ferred during an operand cycle (refer to Table 18). It is valid while the address strobe (AS) is asserted.
1. The resolution of each range within a system frequency category is the range’s lower bound. For example, in
the first row of the 32.768 kHz column, the resolution is 61.0
s.
Table 17 Timer Period Ranges (Downcounters Chained)
RTDC
Clock Source
Time-Out Ranges for Typical Values of fref and fsys
1
32.768 kHz
4.194 MHz
16.777 MHz
20.972 MHz
fsys/2 or fref/2
61.0
s to 72.8 hrs
477 ns to 34.1 mins
119 ns to 8.53 mins
95.4 ns to 6.83 mins
fpre/16
977
s to 48.5 days
7.63
s to 9.10 hrs
1.91
s to 8102 s
1.53
s to 1.82 hrs
fpre/64
3.91 ms to 194 days
30.5
s to 36.4 hrs
7.63
s to 9.10 hrs
6.10
s to 7.28 hrs
fpre/256
15.6 ms to 2.13 yrs
122
s to 6.07 days
30.5
s to 36.4 hrs
24.4
s to 29.1 hrs
fpre/1024
62.5 ms to 8.51 yrs
488
s to 24.3 days 122 s to 6.07 days
97.7
s to 4.85 days
Table 18 SIZE Signal Encoding
SIZE
Transfer Size
1
Byte
0
Word
相关PDF资料 |
PDF描述 |
|---|---|
| S1C60N05F0A0100 | MICROCONTROLLER, PQFP60 |
| SC3S12P128J0CLHR | 16-BIT, MROM, 1.05 MHz, MICROCONTROLLER, PQFP64 |
| SC3S12P128J0CLH | 16-BIT, MROM, 1.05 MHz, MICROCONTROLLER, PQFP64 |
| SC3S12P128J0CQKR | 16-BIT, MROM, 1.05 MHz, MICROCONTROLLER, PQFP80 |
| S908QY2AD1MDW | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SPMC387-01 | 制造商:SSDI 制造商全称:Solid States Devices, Inc 功能描述:50 WATT RADIATION HARDENED DC-DC POWER CONVERTER |
| SPMC68CK338CPV14 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:32-Bit Modular Microcontroller |
| SPMC802B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:32-pin General Purpose Microcontroller (OTP) |
| SPMC802B-C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:32-pin General Purpose Microcontroller (OTP) |
| SPMC802B-PD03 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:32-pin General Purpose Microcontroller (OTP) |
发布紧急采购，3分钟左右您将得到回复。