M68EVB908GB60E Freescale Semiconductor, M68EVB908GB60E Datasheet - Page 86

BOARD EVAL FOR MC9S08GB60

M68EVB908GB60E

Manufacturer Part Number
M68EVB908GB60E
Description
BOARD EVAL FOR MC9S08GB60
Manufacturer
Freescale Semiconductor
Type
MCUr
Datasheet

Specifications of M68EVB908GB60E

Contents
Module and Misc Hardware
Processor To Be Evaluated
MC9S08GB
Data Bus Width
8 bit
Interface Type
RS-232
Silicon Manufacturer
Freescale
Core Architecture
HCS08
Core Sub-architecture
HCS08
Silicon Core Number
MC9S08
Silicon Family Name
S08GB
Kit Contents
GB60 Evaluation Kit
Rohs Compliant
Yes
For Use With/related Products
MC9S08GB60
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Chapter 6 Parallel Input/Output
PTASEn — Slew Rate Control Enable for Port A Bit n (n = 0–7)
PTADDn — Data Direction for Port A Bit n (n = 0–7)
6.6.2
Port B includes eight general-purpose I/O pins that share with the ATD function. Port B pins used as
general-purpose I/O pins are controlled by the port B data (PTBD), data direction (PTBDD), pullup enable
(PTBPE), and slew rate control (PTBSE) registers.
If the ATD takes control of a port B pin, the corresponding PTBDD, PTBSE, and PTBPE bits are ignored.
When a port B pin is being used as an ATD pin, reads of PTBD will return a 0 of the corresponding pin,
provided PTBDD is 0.
86
For port A pins that are outputs, these read/write control bits determine whether the slew rate
controlled outputs are enabled. For port A pins that are configured as inputs, these bits are ignored.
These read/write bits control the direction of port A pins and what is read for PTAD reads.
PTBD
PTBPE
PTBSE
PTBDD
1 = Slew rate control enabled.
0 = Slew rate control disabled.
1 = Output driver enabled for port A bit n and PTAD reads return the contents of PTADn.
0 = Input (output driver disabled) and reads return the pin value.
Port B Registers (PTBD, PTBPE, PTBSE, and PTBDD)
Reset:
Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
PTBPE7
PTBSE7
PTBDD7
PTBD7
Bit 7
0
0
0
0
PTBPE6
PTBSE6
PTBDD6
MC9S08GB/GT Data Sheet, Rev. 2.3
PTBD6
Figure 6-10. Port B Registers
6
0
0
0
0
PTBDD5
PTBPE5
PTBSE5
PTBD5
5
0
0
0
0
PTBDD4
PTBPE4
PTBSE4
PTBD4
4
0
0
0
0
PTBDD3
PTBPE3
PTBSE3
PTBD3
3
0
0
0
0
PTBDD2
PTBPE2
PTBSE2
PTBD2
2
0
0
0
0
PTBDD1
PTBPE1
PTBSE1
PTBD1
Freescale Semiconductor
1
0
0
0
0
PTBDD0
PTBPE0
PTBSE0
PTBD0
Bit 0
0
0
0
0

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