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ST10F280 데이터시트(PDF) 97 Page - STMicroelectronics

부품명 ST10F280
상세설명  16-bit MCU with MAC unit, 512 Kbyte Flash memory and 18 Kbyte RAM
PDF  239 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F280 데이터시트(HTML) 97 Page - STMicroelectronics

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ST10F280
Parallel ports
Doc ID 8673 Rev. 3
97/239
Edge characteristic defines the rise/fall time for the respective output, ie. the transition time.
Slow edge reduce the peak currents that are sinked/sourced when changing the voltage
level of an external capacitive load. For a bus interface or pins that are changing at
frequency higher than 1MHz, however, fast edges may still be required.
Driver characteristic defines either the general driving capability of the respective driver, or if
the driver strength is reduced after the target output level has been reached or not.
Reducing the driver strength increases the output’s internal resistance, which attenuates
noise that is imported via the output line. For driving LEDs or power transistors, however, a
stable high output current may still be required.
For each feature, a 2-bit control field (ie. 4 bits) is provided for each group of 4 port pads (ie.
a port nibble), in port output control registers POCONx.
POCONx
Address:
0xF0yyh / zzh for 8-bit Ports ESFR
Reset:
0x--00h
Type:
R/W
POCONx
Address:
0xF0yyh / zzh for 16-bit Ports ESFR
Reset:
0x0000h
Type:
R/W
Note:
In case of reading an 8 bit P0CONX register, high Byte (bit 15..8) is read as 00h.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
---
--
---
PN1DC
PN1EC
PN0DC
PN0EC
R/W
R/W
R/W
R/W
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
PN3DC
PN3EC
PN2DC
PN2EC
PN1DC
PN1EC
PN0DC
PN0EC
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PNxEC Port Nibble x Edge Characteristic (rise/fall time)
00: Fast edge mode, rise/fall times depend on the driver’s dimensioning.
01: Slow edge mode, rise/fall times ~60 ns
10: Reserved
11: Reserved
PNxDC Port Nibble x Driver Characteristic (output current)
00: High Current mode: Driver always operates with maximum strength.
01: Dynamic Current mode: Driver strength is reduced after the target level has been
reached.
10: Low Current mode: Driver always operates with reduced strength.
11: Reserved



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