MC68HC908GP16CFB Freescale Semiconductor, MC68HC908GP16CFB Datasheet - Page 122

• Manufacturer Part Number: MC68HC908GP16CFB
• Description: MCU 8-BIT 16K FLASH 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP16CFB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 33
• 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: -

Input/Output (I/O) Ports (PORTS)
Figure 12-12
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.
12.6 Port E
Port E is a 2-bit special function port that shares its pins with the enhanced serial communications
interface module (ESCI).
12.6.1 Port E Data Register
The port E data register contains a data latch for each of the port E pins.
122
Alternative Function:
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
DDRD
shows the port D I/O logic.
Bit
0
1
Address:
Reset:
Read:
Write:
READ DDRD ($0007)
WRITE DDRD ($0007)
WRITE PTD ($0003)
READ PTD ($0003)
PTD
Bit
X
X
$0008
Bit 7
MC68HC908EY16 • MC68HC908EY8 Data Sheet, Rev. 10
0
Figure 12-13. Port E Data Register (PTE)
Input, Hi-Z
I/O Pin
Output
Mode
= Unimplemented
Table 12-4. Port D Pin Functions
RESET
Figure 12-12. Port D I/O Circuit
6
0
Accesses to DDRD
Table 12-4
5
0
Read/Write
DDRDx
DDRD[1:0]
DDRD[1:0]
PTDx
Unaffected by reset
4
0
summarizes the operation of the port D pins.
3
0
PTD[1:0]
Read
Pin
Accesses to PTD
2
0
PTE1
RXD
PTD[1:0]
PTD[1:0]
1
Freescale Semiconductor
Write
PTDx
(1)
PTE0
Bit 0
TXD