H8SSLASH2218 datasheet(502/750 Pages) RENESAS

502 / 750 page

Section 13 Boundary Scan Function

Rev.6.00 Jun. 03, 2008 Page 454 of 698

REJ09B0074-0600

13.3.2

IDCODE Register (IDCODE)

IDCODE register is a 32-bit register. If INSTR is set to IDCODE mode, IDCODE is connected

between TDI and TDO. The HD64F2218, HD64F2218U output fixed codes H'002A200F from

the TDO. Serial data cannot be written to IDCODE register through TDI. Table 13.3 shows the

IDCODE register configuration.

Table 13.3

IDCODE Register Configuration

Bits

31 to 28

27 to 12

11 to 1

HD64F2218,

HD64F2218U codes

0000

0000 0010 1010 0010

0000 0000 111

Contents

Version

(4 bits)

Part No.

(16 bits)

Product No.

(11 bits)

Fixed code

(1 bit)

13.3.3

BYPASS Register (BYPASS)

BYPASS is a 1-bit register. If INSTR is specified to BYPASS mode, CLAMP mode, or HIGHZ

mode, BYPASS is connected between TDI and TDO.

13.3.4

Boundary Scan Register (BSCANR)

BSCAN is a 199-bit shift register assigned on the pins to control input/output pins.

The I/O pins consists of three bits (IN, Control, OUT), input pins 1 bit (IN), and output pins 1 bit

(OUT) of shift registers. The boundary scan test based on the JTAG standard can be performed by

using instructions listed in table 13.2. Table 13.4 shows the correspondence between the LSI pins

and boundary scan registers. (In table 13.4, Control indicates the high active pin. By specifying

Control to high, the pin is driven by OUT. ) Figure 13.2 shows the boundary scan register

configuration example.

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