ZiLOG Z86L99 ICEBOX User Manual page 65

A
4
3
2
1
A
UM005100-IRR0400
B
L99 MODE:
- SET ROM_SIZE_RG = 16K.
- T3 IS TRI-STATED.
- WHEN DS_I IS ASSERTED:
IF (FG/BG && OUTSIDE_ROM)
TR-STATE T1.
ELSE IF (FG/BG && !OUTSIDE_ROM)
ENABLE T1.
ELSE IF (!FG/BG)
IF (C_JAM_P1)
TRI-STATE T1.
ELSE
ENABLE T1.
NOTE: ZDS MUST NOT SET D_MEMFLAG REGISTER
DMF_DATA BIT WHEN ACCESSING EXECUTABLE
RAM.
BUFFER
TRANSLATER
3
P1_I[0..7]
0-5V
T3
TARGET
CONNECTOR
P1_I[0..7]
ICE
0-5V
MCU
B
C
P1_M[0..7]
5V
BUFFER
TRANSLATER
AD_Itv[7..0] AD_I[7..0]
1
0-5V 5V
T1
C
D
MOTHERBOARD
INTERFACE
Title
SCHEMATIC, Z86L 99 EMULATION DAUGHTER BOARD
Size Document Number
B
Date: Monday, August 14, 2000 Sheet
D
Schematic 6
E
4
3
2
1
R e v
A
6 of 11
E