HD404849 Datasheet, PDF (106/125 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404849 Series
Pin No.
MCU Mode
PROM Mode Pin No
MCU Mode
PROM Mode
FP-80A,
FP- 80A,
Pin
TFP- 80C FP-80B Pin Name I/O Pin Name I/O TFP-80C FP-80B Pin Name I/O Name I/O
55
57
SEG34 O
68
70
COM3
O
56
58
SEG35 O
69
71
COM4
O
57
59
SEG36 O
70
72
V1
58
60
SEG37 O
71
73
V2
59
61
SEG38 O
72
74
V3
60
62
SEG39 O
61
63
SEG40 O
62
64
SEG41 O
73
75
V_CC
V_CC
74
76
AV_CC
V_CC
75
77
AN0
I
63
65
SEG42 O
76
78
AN1
I
64
66
SEG43 O
77
79
AN2
I
65
67
SEG44 O
78
80
AN3
I
66
68
COM1 O
79
1
R3₀/AN₄
I/O A₁
I
67
69
COM2 O
80
2
R3₁/AN₅
I/O A₂
I
Notes: 1. I/O: Input/output pin, I: Input pin, O: Output pin
2. Each of O₀–O₄ has two pins; before using, each pair must be connected together.
PROM Mode Pin Functions
V_PP: Applies the programming voltage (12.5 V ± 0.3 V) to the built-in PROM.
CE : Inputs a control signal to enable PROM programming and verification.
OE : Inputs a data output control signal for verification.
A₀–A₁₄: Act as address input pins of the built-in PROM.
O₀–O₄: Act as data bus input pins of the built-in PROM. Each of O₀–O₄ has two pins; before using these
pins, connect each pair together.
M₀, M₁, RESET, TEST: Used to set PROM mode. The MCU is set to PROM mode by pulling M₀, M₁,
and RESET low, and TEST high.
Other Pins: Connect pins AV_CC, OSC₁, D₂, D₃, R7₃/SEG20, and V _CC to V_CC. Connect pins AV_SS and X1 to
GND. Leave other pins open.
Programming the Built-In PROM
The MCU’s built-in PROM is programmed in PROM mode. PROM mode is set by pulling RESET, M₀,
and M₁ low, and TEST high. In PROM mode, the MCU does not operate, but it can be programmed in the
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