S912XHY128F0VLM Datasheet, PDF (141/802 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

2.3.87 Port U Slew Rate Register(SRRU)
Port Integration Module (S12XHYPIMV1)
Address 0x0296
R
W
Reset
7
SRRU7
0
1 _{Read: Anytime.}
Write: Anytime.
6
SRRU6
5
SRRU5
4
SRRU4
3
SRRU3
2
SRRU2
0
0
0
0
0
Figure 2-84. Port U Polarity Select Register (SRRU)
Access: User read/write¹
1
0
SRRU1
SRRU0
0
0
Table 2-71. SRRU Register Field Descriptions
Field
Description
7-0
SRRU
Port U Slew Rate Register—Determine the slew rate on the pins¹
1 Enable the slew rate control and disables the digital input buffer
0 Disable the slew rate control and enable the digital input buffer
1 _{When change SRRU from non-zero value to zero value or vice versa, It will need to wait about 300 nanoseconds delay before}
the slew rate control to be real function as setting. When enter STOP, to save the power, the slew rate control will be force to off
state. After wakeup from STOP, it will also need to wait about 300 nanoseconds before slew rate control to be function as setting.
2.3.88 Port U Routing Register (PTURR)
Address 0x0297
7
6
5
4
3
2
R
0
0
0
0
PTURR0 PTURR0
W
Reset
0
0
0
0
0
0
= Unimplemented or Reserved
u = Unaffected by reset
1 _{Read: Always reads 0x00}
Write: Unimplemented
Figure 2-85. Port U Routing Register (PTURR)
Access: User read¹
1
0
0
0
0
0
MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
141