參數(shù)資料
型號(hào): 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(jī)微控制器(8位單片微控制器)
文件頁(yè)數(shù): 19/48頁(yè)
文件大?。?/td> 266K
代理商: ΜPD789800
19
μ
PD789800
Figure 5-6. Block Diagram of Serial Interface 10
Internal bus
Serial I/O shift
register 10 (SIO10)
f
X
/2
2
f
X
/2
3
SI10/P22
SO10/P21
Serial clock counter
SCK10/P20
Serial clock control circuit
Interrupt request
signal generator
INTCSI10
S
S
5.5
Regulator
The
μ
PD789800 incorporates a regulator which powers the USB driver/receiver. The features are as follows:
Generates V
REG
(3.3
±
0.3 V) from V
DD0
and V
DD1
(4.0 to 5.5 V) and outputs it to the REGC pin.
Supports power-saving mode, reducing current dissipation during STOP mode.
Figure 5-7. Block Diagram of the Regulator and USB Driver/Receiver
Regulator
PD789800
μ
USB driver/
receiver
RXD
SEP
SEM
TXDP
TXDM
TXEN
RXEN
V
DD0
V
SS0
V
REG
V
DD0
V
SS0
USBDM
Hub
REGC
V
SS
0.1 F
1.5 k
USBDP
220
Cautions 1.
To settle the V
REG
voltage, connect the REGC pin to V
SS
via a 220-
resistor and a 0.1-
μ
F
capacitor.
Connect the pull-up resistor (1.5 k
), for the USBDM pin, to the REGC pin.
2.
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