參數(shù)資料
型號: μPD789800
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 17/48頁
文件大?。?/td> 266K
代理商: ΜPD789800
17
μ
PD789800
Figure 5-3. Block Diagram of 8-Bit Timer/Event Counter 01
Internal bus
8-bit compare
register 01 (CR01)
Match
S
INTTM01
f
X
/2
4
f
X
/2
8
Clear
8-bit timer
register 01 (TM01)
Internal bus
TI01/P26
/INTP0/TO01
Output control
circuit
TO01/P26/INTP0/
TI01
Figure 5-4. Block Diagram of Watchdog Timer
Prescaler
f
X
2
6
f
X
2
8
f
X
2
10
S
7-bit counter
RUN
C
Clear
f
X
2
4
INTWDT
maskable
interrupt request
RESET
INTWDT
nonmaskable
interrupt request
5.4
Serial Interface
Two channels of serial interface are on chip.
USB function
The
μ
PD789800 supports 1.5 Mbps transfer speed with the system clock of 6.0 MHz and incorporates an NRZI
(Non Return Zero Invert) decode/encode function, bit stuffing function, and CRC (Cyclic Redundancy Check)
function specified by the USB (Universal Serial Bus) communication protocol.
Figure 5-5 shows a block diagram.
Serial interface 10 (SIO10)
SIO10 has the following two modes:
Operation stop mode
Three-wire serial I/O mode (The first bit can be switched between the MSB and LSB.)
Figure 5-6 shows a block diagram.
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