MC908AZ60ACFU Freescale Semiconductor, MC908AZ60ACFU Datasheet - Page 257
MC908AZ60ACFU
Manufacturer Part Number
MC908AZ60ACFU
Description
IC MCU FLASH 8.4MHZ 60K 64QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AZ60ACFUER.pdf
(414 pages)
Specifications of MC908AZ60ACFU
Core Processor
HC08
Core Size
8-Bit
Speed
8.4MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
52
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 15x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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22.5.2 Data Direction Register D
Data direction register D determines whether each port D pin is an input or an output. Writing a logic 1 to
a DDRD bit enables the output buffer for the corresponding port D pin; a logic 0 disables the output buffer.
DDRD[7:0] — Data Direction Register D Bits
Figure 22-13
When bit DDRDx is a logic 1, reading address $0003 reads the PTDx data latch. When bit DDRDx is a
logic 0, reading address $0003 reads the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
Freescale Semiconductor
These read/write bits control port D data direction. Reset clears DDRD[7:0], configuring all port D pins
as inputs.
1 = Corresponding port D pin configured as output
0 = Corresponding port D pin configured as input
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
shows the port D I/O logic.
DDRD
Address:
Avoid glitches on port D pins by writing to the port D data register before
changing data direction register D bits from 0 to 1.
Bit
Reset:
0
1
Read:
Write:
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
READ DDRD ($0007)
WRITE DDRD ($0007)
WRITE PTD ($0003)
READ PTD ($0003)
PTD
DDRD7
$0007
Bit
Bit 7
X
X
0
Figure 22-12. Data Direction Register D (DDRD)
Input, Hi-Z
DDRD6
I/O Pin
Output
Mode
6
0
Table 22-4. Port D Pin Functions
RESET
Figure 22-13. Port D I/O Circuit
DDRD5
5
0
Accesses to DDRD
Table 22-4
Read/Write
DDRD[7:0]
DDRD[7:0]
NOTE
DDRD4
DDRDx
PTDx
4
0
summarizes the operation of the port D pins.
DDRD3
3
0
PTD[7:0]
Read
Pin
DDRD2
Accesses to PTD
2
0
DDRD1
1
0
PTD[7:0]
PTD[7:0]
Write
DDRD0
Bit 0
PTDx
(1)
0
Port D
257
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