p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 442

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 I
(2)
Figures 16.13 and 16.14 show the sample flowcharts for the operations in master receive mode
(WAIT = 1).
Rev. 1.00 Sep. 21, 2006 Page 404 of 658
REJ09B0310-0100
Receive Operation Using the Wait Function
Figure 16.13 Sample Flowchart for Operations in Master Receive Mode
2
C Bus Interface (IIC)
No
No
No
Set BBSY= 0 and SCP= 0
Wait for one clock pulse
Clear IRIC flag in ICCR
Clear IRIC flag in ICCR
Clear IRIC flag in ICCR
Set ACKB = 0 in ICSR
Set HNDS = 0 in ICXR
Set ACKB = 1 in ICSR
Clear IRIC flag in ICCR
Set WAIT = 1 in ICMR
Read IRIC flag in ICCR
Clear IRIC flag in ICCR
Read IRIC flag in ICCR
Set WAIT = 0 in ICMR
(receiving multiple bytes) (WAIT = 1)
Set TRS = 0 in ICCR
Master receive mode
Set TRS = 1 in ICCR
Last receive?
Read ICDR
Read ICDR
Read ICDR
Read ICDR
IRTR = 1?
IRIC = 1?
IRTR=1?
IRIC=1?
in ICCR
End
Yes
Yes
Yes
No
No
Yes
Yes
[16] Read the last receive data.
[17] Generate stop condition
[1] Select receive mode.
[2] Start receiving. The first read
[3] Wait for a receive wait
[5] Read the receive data.
[6] Clear IRIC flag.
[7] Set acknowledge data for the last reception.
[8] Wait for TRS setting
[9] Set TRS for stop condition issuance
[10] Read the receive data.
[11] Clear IRIC flag.
[12] Wait for a receive wait
[13] Determine end of reception
[14] Clear IRIC.
[15] Clear wait mode.
[4] Determine end of reception
(Set IRIC at the fall of the 8th clock) or,
Wait for 1 byte to be received
(Set IRIC at the rise of the 9th clock)
(Set IRIC at the fall of the 8th clock) or,
Wait for 1 byte to be received
(Set IRIC at the rise of the 9th clock)
(to end the wait insertion)
(to end the wait insertion)
is a dummy read.
Clear IRIC flag.
( IRIC flag should be cleared to 0
after setting WAIT = 0.)