upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 50

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Chapter 2
50
Initial Value
Table 2-16
Address
Access
2.2.5 Alternative input selection
Note
(1)
Alternative input functions of CSIB0, UART0, UART1, I
provided on two pins each. Thus you can select on which pin the alternative
function should appear. For this purpose, four peripheral function select
registers PFSRk (k = 0, 3) are provided.
The selection of the alternative input function is done by a different circuit than
the selection of the alternative output function. Therefore, the registers for
selecting the alternative input functions (PFSR) are not reflected in the block
diagrams of the port types in chapter “Port Types Diagrams“ on page 52.
PFSR0 - Peripheral function select register
The 8-bit PFSR0 register selects the alternative input paths for the peripheral
functions CSIB0, I
This register can be read/written in 8-bit units.
FFFF F720
01
a)
PFSR0 register contents
Preliminary User’s Manual U17566EE1V2UM00
Bit position
R/W
H
0
7
. This register is initialized by any reset.
a
These bits must not be changed!
5
4
0
R/W
H
0
6
a
Bit name
PFSR05
PFSR04
PFSR00
PFSR05 PFSR04
2
C0 and I
R/W
5
2
R/W
C1.
Specifies the alternative input path for I
Specifies the alternative input path for I
Specifies the alternative input path for CSIB0:
4
0: SCL1 is input from P21 (SCL1_0)
1: SCL1 is input from P31 (SCL1_1)
0: SCL0 is input from P17 (SCL0_0)
1: SCL0 is input from P64 (SCL0_1)
0: SCKB0 is input from P42 (SCKB0_0)
1: SCKB0 is input from P107 (SCKB0_1)
SDA1 is input from P20 (SDA1_0)
SDA1 is input from P30 (SDA1_1)
SDA0 is input from P16 (SDA0_0)
SDA0 is input from P65 (SDA0_1)
SIB0 is input from P40 (SIB0_0)
SIB0 is input from P105 (SIB0_1)
R/W
0
3
a
R/W
0
2
a
Function
R/W
2
0
1
C0 and I
a
PFSR00
R/W
Pin Functions
0
2
2
2
C1 are
C1:
C0: