H8SXSLASH1663M datasheet(1251/1504 Pages) RENESAS

1251 / 1504 page

Section 26 Boundary Scan

Rev. 2.00 Sep. 24, 2008 Page 1219 of 1468

REJ09B0412-0200

26.6

Usage Notes

1. In serial transfer, data are input or output in LSB order (see figure 26.3).

From TDI pin

JTIR and JTIDR

Bit 31

Bit 30

Bit 1

Bit 0

Shift

Serial data

input/output

in LSB order

Notes: Serial data output from JTIR to TDO is not possible.

Serial data input from TDI to JTIDR is not possible.

To TDO pin

Figure 26.3 Serial Data Input/Output

2. If a pin with open-drain function is SAMPLEed while its open-drain function is enabled and

while the corresponding OUT register is set to 1, the corresponding Control register is cleared

to 0 (the pin status is Hi-Z). If the pin is SAMPLEed while the corresponding OUT register is

cleared to 0, the corresponding Control register is 1 (the pin status is 0)

3. Pins of the boundary scan (TCK, TDI, TMS, and

TRST) have to be pulled up by pull-up

resistors.

4. Power supply pins (Vcc, VcL, Vss, AVcc, AVss, AVref, PLLVcc, PLLVss, DrVcc, and

DrVss) cannot be boundary-scanned.

5. Clock pins (EXTAL and XTAL) cannot be boundary-scanned.

6. Reset and standby signals (

RES and STBY) cannot be boundary-scanned.

7. Boundary scan pins (TCK, TMS,

TRST, TDI, and TDO) cannot be boundary-scanned.

8. The boundary scan function is not available when this LSI are in the following states.

(1) Reset state

(2) Hardware standby mode, software standby mode, and deep software standby mode

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