MC908GT16CBE Freescale Semiconductor, MC908GT16CBE Datasheet - Page 127

• Manufacturer Part Number: MC908GT16CBE
• Description: IC MCU 16K FLASH 8MHZ SPI 42SDIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908GT16CBE

• 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: 42-DIP (0.600", 15.24mm)
• Controller Family/series: HC08
• No. Of I/o's: 34
• Ram Memory Size: 512Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• Processor Series: HC08GT
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 30
• Number Of Timers: 4
• Operating Supply Voltage: 0 V to 5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Development Tools By Supplier: FSICEBASE, DEMO908GZ60E, M68CBL05CE, M68EML08GPGTE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Package: 42SPDIP
• Family Name: HC08
• Maximum Speed: 8 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Figure 12-4
When bit DDRAx is a 1, reading address $0000 reads the PTAx data latch. When bit DDRAx is a 0,
reading address $0000 reads the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
12.2.3 Port A Input Pullup Enable Register
The port A input pullup enable register (PTAPUE) contains a software configurable pullup device for each
of the eight port A pins. Each bit is individually configurable and requires that the data direction register,
DDRA, bit be configured as an input. Each pullup is automatically and dynamically disabled when a port
bit’s DDRA is configured for output mode
Freescale Semiconductor
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 impedance
PTAPUE
Bit
X
1
0
shows the port A I/O logic.
Address:
DDRA
Reset:
Read:
Write:
Bit
0
0
1
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
Figure 12-5. Port A Input Pullup Enable Register (PTAPUE)
DD
READ DDRA ($0004)
WRITE DDRA ($0004)
WRITE PTA ($0000)
READ PTA ($0000)
PTAPUE7
$0004
by internal pullup device
Bit 7
0
PTA
X
Bit
X
X
(1)
PTAPUE6
6
0
Input, Hi-Z
Input, V
Table 12-2. Port A Pin Functions
RESET
Figure 12-4. Port A I/O Circuit
I/O Pin
Output
Mode
PTAPUE5
DD
5
0
(2)
(4)
Table 12-2
PTAPUE4
DDRAx
Accesses to DDRA
PTAx
4
0
DDRA7–DDRA0
DDRA7–DDRA0
DDRA7–DDRA0
.
Read/Write
PTAPUE3
summarizes the operation of the port A pins.
3
0
PTAPUE2
2
0
PTAPUEx
PTA7–PTA0
Read
PTAPUE1
Pin
Pin
1
0
Accesses to PTA
V
DD
45 k
PTAPUE0
Bit 0
PTAx
0
PTA7–PTA0
PTA7–PTA0
PTA7–PTA0
Write
Port A
(3)
(3)
127