Datasheet

Section 13 Boundary Scan Function
Rev.7.00 Dec. 24, 2008 Page 454 of 698
REJ09B0074-0700
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, HD64F2218CU and HD64F2217CU
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 0
HD64F2218,
HD64F2218U,
HD64F2218CU and
HD64F2217CU codes
0000 0000 0010 1010 0010 0000 0000 111 1
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.