NEC PD703114 User Manual page 355

Figure 9-74. Capture Operation: Mode with 16-Bit Buffer
Bit = 0, TByE0 Bit = 1, CCSEy Bit = 0, LNKEy Bit = 0, BFEEy Bit = 1, EEVEy Bit = 1,
and CSCE0 Register's SEVEy Bit = 0)
f
CLK
MUXTB0
MUXTB1
1
MUXCNT 5
TB1 TB0
ED1
Event
CAPTURE_P L
CAPTURE_S
BUFFER
READ_ENABLE_P
Capture
CVPEm0 register
Undefined
CVSEm0 register Undefined
Notes 1. To operate TM2n in the mode with 16-bit buffer, perform a capture at least twice at the start of an
operation and read the CVPEm0 register. Also, read the CVPEm0 register after performing a capture
at least once.
2. A write operation to the CVPEn0 register is not performed at these signal inputs because the CVSEm0
register operates as a buffer.
3. After this timing, a write operation from the CVSEm0 register to the CVPEm0 register is enabled.
Remarks 1. f : Base clock
CLK
2. BUFFER: Timing of write operation from CVSEm0 register to CVPEm0 register
CAPTURE_P: Capture trigger signal of main capture register
CAPTURE_S: Capture trigger signal of sub capture register
ED1: Capture event signal input from edge selector
MUXCNT: Count value to subchannel m
MUXTB0, MUXTB1: Multiplex signal of TM20, TM21
READ_ENABLE_P: Read timing of CVPEm0 register
TB0: Count value of TM20; TB1: Count value of TM21
3. m = 1 to 4, x = 12, 34
y: When x = 12, y = 1, 2, and when x = 34, y = 3, 4
CHAPTER 9 TIMER/COUNTER FUNCTION
6 2 7 3 8 4
TB1
TB1 TB0 TB0 TB1 TB0
Note 2
Shift
2 3
User's Manual U15195EJ5V0UD
Note 1
(When CMSEx0 Register's TByE1
9 5 10 6 11 7
TB1 TB0 TB1 TB0 TB1 TB0
Note 3
2
4
12 8 13 9 14 10
TB1 TB0 TB1 TB0 TB1 TB0
New event
4
8
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