MC68HC908GT16CFB Freescale Semiconductor, MC68HC908GT16CFB Datasheet - Page 134
MC68HC908GT16CFB
Manufacturer Part Number
MC68HC908GT16CFB
Description
IC MCU 16K FLASH 8MHZ SPI 44PQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908GT8CFBE.pdf
(292 pages)
Specifications of MC68HC908GT16CFB
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
36
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Input/Output (I/O) Ports (PORTS)
When bit DDRDx is a 1, reading address $0003 reads the PTDx data latch. When bit DDRDx is a 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.
12.5.3 Port D Input Pullup Enable Register
The port D input pullup enable register (PTDPUE) contains a software configurable pullup device for each
of the eight port D pins. Each bit is individually configurable and requires that the data direction register,
DDRD, bit be configured as an input. Each pullup is automatically and dynamically disabled when a port
bit’s DDRD is configured for output mode.
PTDPUE7–PTDPUE0 — Port D Input Pullup Enable Bits
12.6 Port E
Port E is a 5-bit special-function port that shares two of its pins with the serial communications interface
(SCI) module and two of its pins with the internal clock generator (ICG).
134
1. X = Don’t care
2. I/O pin pulled up to V
3. Writing affects data register, but does not affect input.
4. Hi-Z = High imp[edance
PTDPUE
These writable bits are software programmable to enable pullup devices on an input port bit.
Bit
X
1
0
1 = Corresponding port D pin configured to have internal pullup
0 = Corresponding port D pin has internal pullup disconnected
Address:
DDRD
Reset:
Read:
Write:
Bit
0
0
1
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
Figure 12-16. Port D Input Pullup Enable Register (PTDPUE)
DD
PTDPUE7
$000F
Bit 7
by internal pullup device.
0
PTD
X
Bit
X
X
(1)
PTDPUE6
6
0
Input, Hi-Z
Input, V
Table 12-5. Port D Pin Functions
I/O Pin
Output
Mode
PTDPUE5
DD
(2)
(4)
5
0
Table 12-5
PTDPUE4
Accesses to DDRD
DDRD7–DDRD0
DDRD7–DDRD0
DDRD7–DDRD0
4
0
Read/Write
PTDPUE3
summarizes the operation of the port D pins.
3
0
PTDPUE2
2
0
PTD7–PTD0
Read
Pin
Pin
PTDPUE1
Accesses to PTD
1
0
Freescale Semiconductor
PTDPUE0
Bit 0
0
PTD7–PTD0
PTD7–PTD0
PTD7–PTD0
Write
(3)
(3)
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