MC9S08QG84CFFE Freescale Semiconductor, MC9S08QG84CFFE Datasheet - Page 87

• Manufacturer Part Number: MC9S08QG84CFFE
• Description: IC MCU 8BIT 8K FLASH 16-QFN
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08QG84CFFE

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-QFN
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: I2C, SCI, SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: DEMO9S08QG8E - BOARD DEMO FOR MC9S08QG8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

6.4.4.3
An output pin can be selected to have high output drive strength by setting the corresponding bit in the
drive strength select register (PTBDSn). When high drive is selected, a pin is capable of sourcing and
sinking greater current. Even though every I/O pin can be selected as high drive, the user must ensure that
the total current source and sink limits for the chip are not exceeded. Drive strength selection is intended
to affect the DC behavior of I/O pins. However, the AC behavior is also affected. High drive allows a pin
to drive a greater load with the same switching speed as a low drive enabled pin into a smaller load.
Because of this the EMC emissions may be affected by enabling pins as high drive.
Freescale Semiconductor
PTBDS[7:0]
Reset:
Field
7:0
W
R
PTBDS7
Output Drive Strength Selection for Port B Bits — Each of these control bits selects between low and high
output drive for the associated PTB pin. For port B pins that are configured as inputs, these bits have no effect.
0 Low output drive strength selected for port B bit n.
1 High output drive strength selected for port B bit n.
Port B Drive Strength Select (PTBDS)
0
7
Figure 6-16. Drive Strength Selection for Port B Register (PTBDS)
PTBDS6
0
6
Table 6-10. PTBDS Register Field Descriptions
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
PTBDS5
0
5
PTBDS4
0
4
Description
PTBDS3
3
0
PTBDS2
Chapter 6 Parallel Input/Output Control
0
2
PTBDS1
0
1
PTBDS0
0
0
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