System Clock Output Function - Mitsubishi Electric M32R Series User Manual

18

18.1.2 System Clock Output Function

A clock whose frequency is twice the input frequency can be output from the BCLK pin. The BCLK
pin is shared with port P70. When you use this pin to output the system clock, set the P7 Operation
Mode Register (P7MOD)'s D8 bit to 1. Configuration of the P7 Operation Mode Register is shown
below.
P7 Operation Mode Register (P7MOD)
D8
P70MOD P71MOD P72MOD P73MOD P74MOD P75MOD P76MOD P77MOD
D Bit Name
8 P70MOD
(Port P70 operation mode)
9 P71MOD
(Port P71 operation mode)
10 P72MOD
(Port P72 operation mode)
11 P73MOD
(Port P73 operation mode)
12 P74MOD
(Port P74 operation mode)
13 P75MOD
(Port P75 operation mode)
14 P76MOD
(Port P76 operation mode)
15 P77MOD
(Port P77 operation mode)
9 10 11
Function
0 : P70
1 : BCLK
0 : P71
____
1 : WAIT
0 : P72
____
1 : HREQ
0 : P73
____
1 : HACK
0 : P74
1 : RTDTXD
0 : P75
1 : RTDRXD
0 : P76
1 : RTDACK
0 : P77
1 : RTDCLK
18-3
OSCILLATION CIRCUIT
<Address: H'0080 0747>
12 13 14
18.1 Oscillator Circuit
D15
<When reset : H'00>
R W
Ver.0.10