MC908GR32AVFAE Datasheet, PDF (147/314 Pages) Freescale Semiconductor, Inc – Microcontrollers

READ DDRE ($000C)
WRITE DDRE ($000C)
RESET
WRITE PTE ($0008)
DDREx
PTEx
Port F
PTEx
READ PTE ($0008)
Figure 12-19. Port E I/O Circuit
Table 12-6. Port E Pin Functions
DDRE
Bit
0
1
PTE
Bit
X⁽¹⁾
X
I/O Pin
Mode
Input, Hi-Z⁽²⁾
Output
Accesses to DDRE
Read/Write
DDRE5–DDRE0
DDRE5–DDRE0
1. X = Don’t care
2. Hi-Z = High impedance
3. Writing affects data register, but does not affect input.
Accesses to PTE
Read
Write
Pin
PTE5–PTE0⁽³⁾
PTE5–PTE0
PTE5–PTE0
12.8 Port F
Port F is an 8-bit special-function port that shares four of its pins with the timer interface (TIM2) module.
12.8.1 Port F Data Register
The port F data register (PTF) contains a data latch for each of the eight port F pins.
Address:
Read:
Write:
Reset:
Alternate Function:
$0440
Bit 7
PTF7
T2CH5
6
PTF6
T2CH4
5
PTF5
T2CH3
4
3
PTF4
PTF3
Unaffected by reset
T2CH2
2
PTF2
1
PTF1
Bit 0
PTF0
= Unimplemented
Figure 12-20. Port F Data Register (PTF)
PTF7–PTF0 — Port F Data Bits
These read/write bits are software-programmable. Data direction of each port F pin is under the control
of the corresponding bit in data direction register F. Reset has no effect on port F data.
MC68HC908GR60A • MC68HC908GR48A • MC68HC908GR32A Data Sheet, Rev. 5
Freescale Semiconductor
147