參數(shù)資料
型號: MC68HC05F8B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PDIP56
封裝: SDIP-56
文件頁數(shù): 92/126頁
文件大?。?/td> 736K
代理商: MC68HC05F8B
MOTOROLA
7-4
MC68HC05F8
SERIAL PERIPHERAL INTERFACE
7
7.4.1
SPI Control Register (SPCR)
SPIE - Serial Peripheral Interrupt Enable
When the serial peripheral interrupt enable bit is high, it allows the occurrence of a processor
interrupt and forces the proper vector to be loaded into the program counter if the serial peripheral
Figure 7-3 SPI Block Diagram
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$10
SPIE
SPE
MSTR
00-0 ----
MASTER
START LOGIC
SLAVE
START LOGIC
CONTROL BITS
SCK
SDO
SDI
READ BUFFER
8-BIT SHIFT
REGISTER
STATE
CONTROLLER
FLAGS
(LOAD)
(FULL)
WRITE
SPCR
SPSR
2
3
8
READ
INTERNAL
D
AT
A
B
U
S
Note:
SCK, MOSI, and MISO are external pins; where
SCK
-
provides system clock when device is congured as a master unit. Receives system clock
when device is congured as a slave unit.
SDI
-
provides serial output to slave unit when device is congured as a master. Receives serial
input from master when device is congured as a slave unit.
SDO
-
receives serial input from slave unit when device is congured as a master. Provides serial
output to master when device is congured as a slave unit.
SPIF
E/4
CLOCK
8
TPG
66
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