DEMO9S08EL32 Freescale Semiconductor, DEMO9S08EL32 Datasheet - Page 89

• Manufacturer Part Number: DEMO9S08EL32
• Description: BOARD DEMO FOR 9S08 EL MCU
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S08EL32

• Contents: Evaluation Board
• Processor To Be Evaluated: MC9S08EL32
• Data Bus Width: 8 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 12 V
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08EL
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08EL32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.5.2.5
6.5.2.6
Freescale Semiconductor
PTBDS[7:0]
PTBMOD
Reset:
Reset:
PTBACK
PTBIE
PTBIF
Field
Field
7:0
3
2
1
0
W
W
R
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 Interrupt Flag — PTBIF indicates when a Port B interrupt is detected. Writes have no effect on PTBIF.
0 No Port B interrupt detected.
1 Port B interrupt detected.
Port B Interrupt Acknowledge — Writing a 1 to PTBACK is part of the flag clearing mechanism. PTBACK
always reads as 0.
Port B Interrupt Enable — PTBIE determines whether a port B interrupt is requested.
0 Port B interrupt request not enabled.
1 Port B interrupt request enabled.
Port B Detection Mode — PTBMOD (along with the PTBES bits) controls the detection mode of the port B
interrupt pins.
0 Port B pins detect edges only.
1 Port B pins detect both edges and levels.
Port B Drive Strength Selection Register (PTBDS)
0
Port B Interrupt Status and Control Register (PTBSC)
0
0
7
7
Figure 6-16. Port B Interrupt Status and Control Register (PTBSC)
Figure 6-15. Drive Strength Selection for Port B Register (PTBDS)
PTBDS6
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
0
0
0
6
6
Table 6-13. PTBDS Register Field Descriptions
Table 6-14. PTBSC Register Field Descriptions
PTBDS5
0
0
0
5
5
PTBDS4
0
0
0
4
4
Description
Description
PTBDS3
PTBIF
3
0
3
0
PTBDS2
PTBACK
Chapter 6 Parallel Input/Output Control
0
0
0
2
2
PTBDS1
PTBIE
0
0
1
1
PTBMOD
PTBDS0
0
0
0
0
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