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參數(shù)資料
| 型號(hào)： | EM6821TQ52B |
| 英文描述： | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-EPSOIC |
| 中文描述： | 微控制器 |
| 文件頁數(shù)： | 5/69頁 |
| 文件大?。?/td> | 852K |
| 代理商： | EM6821TQ52B |
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EM6821
10/01, Revision A/386
Copyright
2001, EM Microelectronic-Marin SA
13
www.emmicroelectronic.com
6. Input and Output Ports
The EM6821 has:
- One 4-bit input port ( port A )
- One 4-bit input/output port. ( port B )
- One serial interface (port SP) also configurable as 4-bit I/O port
Pull-up and pull-down resistors can be added to all this ports with metal and/or register options.
6.1 Ports Overview
Table 6.1.1 Input and Output Ports Overview
Port
Mode
Mask(M:) or Register(R:)
Option
Function
Bit-wise Multifunction on Ports
PA
[3:0]
Input
M: Pull-up
M: Pull-down (default)
R: Pull(up/down) select
R: Debouncer or direct
input for IRQ requests
and Counter
R: + or - for IRQ-edge
and counter
R: Input reset
combination
-Input
-Bit-wise interrupt request
-Software test variable
conditional jump
-PA[3],PA[0] input for the
event counter
-PA[3] input for the
millisecond counter
-Port A reset inputs
PA[3]
10 bit
event
counter
clock
start/stop
of MSC
PA[2]
-
PA[1]
-
PA[0]
10 bit
event
counter
clock
-
PB
[3:0]
Individual
input or
output
R: CMOS or
Nch. open drain output
R: Pull-down on input
R: Pull-up on input
-Input or output
-PB[3] for the PWM output
-PB[2:0] for the Ck[16,11,1]
output
-Tristate output
PB[3]
PWM
output
PB[2]
Ck[16]
output
PB[1]
Ck[11]
output
PB[0]
Ck[1]
output
PS
[3:0]
Serial I/O
or
port-wise
input /
output
R: CMOS or
Nch open drain output
R: Pull-down on input
R: Pull-up on input
-PSP[3], serial clock out
-PSP[2], serial data out
-PSP[1], serial status out
-PSP[0], serial data in
-PSP[3:0] 4-bit input/output
-Tristate output
PSP[3]
Serial
clock
output
SCLK
PSP[2]
Serial
data
output
SOUT
PSP[1]
Ready or
CS
Ready/CS
PSP[0]
Serial
data
input
SIN
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