NEC 78K0 Series User Manual page 391

Figure 16-6. Format of Serial Clock Selection Register 11 (CSIC11)
Address: FF89H After reset: 00H R/W
Symbol 7
CSIC11 0
CKP11
0
0
1
1
CKS112
0
0
0
0
1
1
1
1
Cautions 1. Do not write to CSIC11 while CSIE11 = 1 (operation enabled).
2. To use P02/SO11 and P04/SCK11 as general-purpose ports, set CSIC11 in the default status
(00H).
3. The phase type of the data clock is type 1 after reset.
Remark f : Peripheral hardware clock frequency
PRS
CHAPTER 16 SERIAL INTERFACES CSI10 AND CSI11
6 5
0 0 CKP11
DAP11 Specification of data transmission/reception timing
0
SCK11
SO11
SI11 input timing
1
SCK11
SO11
SI11 input timing
0
SCK11
SO11
SI11 input timing
1
SCK11
SO11
SI11 input timing
CKS111 CKS110
0 0 f
PRS
0 1 f
PRS
1 0 f
PRS
1 1 f
PRS
0 0 f
PRS
0 1 f
PRS
1 0 f
PRS
1 1 External clock input to SCK11
Preliminary User's Manual U17260EJ3V1UD
4 3
DAP11 CKS112
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
CSI11 serial clock selection
f = f =
PRS PRS
2 MHz 5 MHz
/2 1 MHz 2.5 MHz 5 MHz
2
/2 500 kHz 1.25 MHz 2.5 MHz
3
/2 250 kHz 625 kHz 1.25 MHz
4
/2 125 kHz 312.5 kHz 625 kHz
5
/2 62.5 kHz 156.25 kHz 312.5 kHz 625 kHz
6
/2 31.25 kHz 78.13 kHz 156.25 kHz 312.5 kHz
7
/2 15.63 kHz 39.06 kHz 78.13 kHz 156.25 kHz
2 1 0
CKS111 CKS110
Type
1
2
3
4
Mode
f = f =
PRS PRS
10 MHz 20 MHz
10 MHz Master mode
5 MHz
2.5 MHz
1.25 MHz
Slave mode
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