3 udcr: up/down counter register – FUJITSU MB91460 SERIES FR60 User Manual
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Chapter 41 Up/Down Counter
4.Register
4.3 UDCR: Up/Down Counter Register
This register is used to read the count value of Up/Down Counter.
• UDCR10 (Up/Down Counter 0/1): Address 0302
H
(Access:
Byte, Half-Word
)
• UDCR32 (Up/Down Counter 2/3): Address 0312
H
(Access:
Byte, Half-Word
)
Depending on the setting of the 16-bit mode enable bit (CCR.M16E), this register behaves differently.
■
16 Bit Mode (M16E= “1”)
In the 16 bit mode, this register functions as 16-bit up/down counter register.
• UDCR10 (Up/Down Counter): Address 0302
H
(Access: Half-word)
• UDCR32 (Up/Down Counter): Address 0312
H
(Access: Half-word)
Meaning of Bit Attribute Symbols (Page No.10)
For the 16 bit mode, be sure to read by
half-word access.
■
8 Bit Mode (M16E=“0”)
In the 8 bit mode, this register functions as a 8-bit up/down counter register 0 and a 8-bit up/down counter
register 1.
• UDCR1 (Up/Down Counter 1): Address 00302
H
(Access: Byte, Half-word)
• UDCR0 (Up/Down Counter 0): Address 00303
H
(Access: Byte, Half-word)
• UDCR3 (Up/Down Counter 3): Address 00312
H
(Access: Byte, Half-word)
• UDCR2 (Up/Down Counter 2): Address 00313
H
(Access: Byte, Half-word)
Meaning of Bit Attribute Symbols (Page No.10)
15
14
13
12
11
10
9
8
bit
D15
D14
D13
D12
D11
D10
D09
D08
0
0
0
0
0
0
0
0
Initial value
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
Attribute
7
6
5
4
3
2
1
0
bit
D07
D06
D05
D04
D03
D02
D01
D00
0
0
0
0
0
0
0
0
Initial value
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
Attribute
7
6
5
4
3
2
1
0
bit
D07
D06
D05
D04
D03
D02
D01
D00
0
0
0
0
0
0
0
0
Initial
value
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
R/WX
Attribute